diff --git a/lib/Api/AccountApi.php b/lib/Api/AccountApi.php
index 920e3fec..9a63ffd1 100644
--- a/lib/Api/AccountApi.php
+++ b/lib/Api/AccountApi.php
@@ -70,9 +70,9 @@ class AccountApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/AttributesApi.php b/lib/Api/AttributesApi.php
index add93cd5..9156dbd8 100644
--- a/lib/Api/AttributesApi.php
+++ b/lib/Api/AttributesApi.php
@@ -70,9 +70,9 @@ class AttributesApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/CRMApi.php b/lib/Api/CRMApi.php
index dd67b493..98fc8bf1 100644
--- a/lib/Api/CRMApi.php
+++ b/lib/Api/CRMApi.php
@@ -70,9 +70,9 @@ class CRMApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/CompaniesApi.php b/lib/Api/CompaniesApi.php
index e2216dda..fde7d62a 100644
--- a/lib/Api/CompaniesApi.php
+++ b/lib/Api/CompaniesApi.php
@@ -70,9 +70,9 @@ class CompaniesApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/ConversationsApi.php b/lib/Api/ConversationsApi.php
index 570d4c51..de8d42f2 100644
--- a/lib/Api/ConversationsApi.php
+++ b/lib/Api/ConversationsApi.php
@@ -70,9 +70,9 @@ class ConversationsApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/CouponsApi.php b/lib/Api/CouponsApi.php
index ee2bde72..6f755d94 100644
--- a/lib/Api/CouponsApi.php
+++ b/lib/Api/CouponsApi.php
@@ -70,9 +70,9 @@ class CouponsApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/DealsApi.php b/lib/Api/DealsApi.php
index 1540c93e..78d57fb3 100644
--- a/lib/Api/DealsApi.php
+++ b/lib/Api/DealsApi.php
@@ -70,9 +70,9 @@ class DealsApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/DomainsApi.php b/lib/Api/DomainsApi.php
index c4ec0d6b..1b7ed4e9 100644
--- a/lib/Api/DomainsApi.php
+++ b/lib/Api/DomainsApi.php
@@ -70,9 +70,9 @@ class DomainsApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/EcommerceApi.php b/lib/Api/EcommerceApi.php
index d6674745..e2852b4a 100644
--- a/lib/Api/EcommerceApi.php
+++ b/lib/Api/EcommerceApi.php
@@ -70,9 +70,9 @@ class EcommerceApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/EventsApi.php b/lib/Api/EventsApi.php
index 88a81c40..e4e4e438 100644
--- a/lib/Api/EventsApi.php
+++ b/lib/Api/EventsApi.php
@@ -70,9 +70,9 @@ class EventsApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/ExternalFeedsApi.php b/lib/Api/ExternalFeedsApi.php
index 3970d761..a97af3d8 100644
--- a/lib/Api/ExternalFeedsApi.php
+++ b/lib/Api/ExternalFeedsApi.php
@@ -70,9 +70,9 @@ class ExternalFeedsApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/FilesApi.php b/lib/Api/FilesApi.php
index ee1f1900..1de485d4 100644
--- a/lib/Api/FilesApi.php
+++ b/lib/Api/FilesApi.php
@@ -70,9 +70,9 @@ class FilesApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/FoldersApi.php b/lib/Api/FoldersApi.php
index 80d50fb5..e6fb49e6 100644
--- a/lib/Api/FoldersApi.php
+++ b/lib/Api/FoldersApi.php
@@ -70,9 +70,9 @@ class FoldersApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/InboundParsingApi.php b/lib/Api/InboundParsingApi.php
index 865dd15f..98ed8d45 100644
--- a/lib/Api/InboundParsingApi.php
+++ b/lib/Api/InboundParsingApi.php
@@ -70,9 +70,9 @@ class InboundParsingApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/ListsApi.php b/lib/Api/ListsApi.php
index da332bd8..a541efcb 100644
--- a/lib/Api/ListsApi.php
+++ b/lib/Api/ListsApi.php
@@ -70,9 +70,9 @@ class ListsApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/MasterAccountApi.php b/lib/Api/MasterAccountApi.php
index 8de81ebc..300231f3 100644
--- a/lib/Api/MasterAccountApi.php
+++ b/lib/Api/MasterAccountApi.php
@@ -70,9 +70,9 @@ class MasterAccountApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/NotesApi.php b/lib/Api/NotesApi.php
index 16e235d8..13b4a3b9 100644
--- a/lib/Api/NotesApi.php
+++ b/lib/Api/NotesApi.php
@@ -70,9 +70,9 @@ class NotesApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/ProcessApi.php b/lib/Api/ProcessApi.php
index 7e386282..e23d5f10 100644
--- a/lib/Api/ProcessApi.php
+++ b/lib/Api/ProcessApi.php
@@ -70,9 +70,9 @@ class ProcessApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/ResellerApi.php b/lib/Api/ResellerApi.php
index 410a8c5e..d60943b4 100644
--- a/lib/Api/ResellerApi.php
+++ b/lib/Api/ResellerApi.php
@@ -70,9 +70,9 @@ class ResellerApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/SMSCampaignsApi.php b/lib/Api/SMSCampaignsApi.php
index f01c6788..4c22cf74 100644
--- a/lib/Api/SMSCampaignsApi.php
+++ b/lib/Api/SMSCampaignsApi.php
@@ -70,9 +70,9 @@ class SMSCampaignsApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/SendersApi.php b/lib/Api/SendersApi.php
index 8da7a976..c64b7335 100644
--- a/lib/Api/SendersApi.php
+++ b/lib/Api/SendersApi.php
@@ -70,9 +70,9 @@ class SendersApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/TasksApi.php b/lib/Api/TasksApi.php
index 259ce0f9..673e69ec 100644
--- a/lib/Api/TasksApi.php
+++ b/lib/Api/TasksApi.php
@@ -70,9 +70,9 @@ class TasksApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/TransactionalSMSApi.php b/lib/Api/TransactionalSMSApi.php
index 669db59f..a9dcd211 100644
--- a/lib/Api/TransactionalSMSApi.php
+++ b/lib/Api/TransactionalSMSApi.php
@@ -69,9 +69,9 @@ class TransactionalSMSApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/UserApi.php b/lib/Api/UserApi.php
index 34298d70..9fcf8514 100644
--- a/lib/Api/UserApi.php
+++ b/lib/Api/UserApi.php
@@ -70,9 +70,9 @@ class UserApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/WebhooksApi.php b/lib/Api/WebhooksApi.php
index 67c60969..a095e7dc 100644
--- a/lib/Api/WebhooksApi.php
+++ b/lib/Api/WebhooksApi.php
@@ -70,9 +70,9 @@ class WebhooksApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Api/WhatsAppCampaignsApi.php b/lib/Api/WhatsAppCampaignsApi.php
index e6430a02..16faaa72 100644
--- a/lib/Api/WhatsAppCampaignsApi.php
+++ b/lib/Api/WhatsAppCampaignsApi.php
@@ -70,9 +70,9 @@ class WhatsAppCampaignsApi
      * @param HeaderSelector  $selector
      */
     public function __construct(
-        ClientInterface $client = null,
-        Configuration $config = null,
-        HeaderSelector $selector = null
+        ?ClientInterface $client = null,
+        ?Configuration $config = null,
+        ?HeaderSelector $selector = null
     ) {
         $this->client = $client ?: new Client();
         $this->config = $config ?: new Configuration();
diff --git a/lib/Model/AbTestCampaignResult.php b/lib/Model/AbTestCampaignResult.php
index b9695a3c..0d015304 100644
--- a/lib/Model/AbTestCampaignResult.php
+++ b/lib/Model/AbTestCampaignResult.php
@@ -246,7 +246,7 @@ public function getWinningCriteriaAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['winningVersion'] = isset($data['winningVersion']) ? $data['winningVersion'] : null;
         $this->container['winningCriteria'] = isset($data['winningCriteria']) ? $data['winningCriteria'] : null;
@@ -581,5 +581,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/AbTestCampaignResultClickedLinks.php b/lib/Model/AbTestCampaignResultClickedLinks.php
index 55733e57..23decfbc 100644
--- a/lib/Model/AbTestCampaignResultClickedLinks.php
+++ b/lib/Model/AbTestCampaignResultClickedLinks.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['versionA'] = isset($data['versionA']) ? $data['versionA'] : null;
         $this->container['versionB'] = isset($data['versionB']) ? $data['versionB'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/AbTestCampaignResultStatistics.php b/lib/Model/AbTestCampaignResultStatistics.php
index e705a7f0..c8f830fe 100644
--- a/lib/Model/AbTestCampaignResultStatistics.php
+++ b/lib/Model/AbTestCampaignResultStatistics.php
@@ -200,7 +200,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['openers'] = isset($data['openers']) ? $data['openers'] : null;
         $this->container['clicks'] = isset($data['clicks']) ? $data['clicks'] : null;
@@ -469,5 +469,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/AbTestVersionClicks.php b/lib/Model/AbTestVersionClicks.php
index 451cb821..d31cd351 100644
--- a/lib/Model/AbTestVersionClicks.php
+++ b/lib/Model/AbTestVersionClicks.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
     }
 
@@ -277,5 +277,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/AbTestVersionClicksInner.php b/lib/Model/AbTestVersionClicksInner.php
index f1ef63da..f44e0c8c 100644
--- a/lib/Model/AbTestVersionClicksInner.php
+++ b/lib/Model/AbTestVersionClicksInner.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['link'] = isset($data['link']) ? $data['link'] : null;
         $this->container['clicksCount'] = isset($data['clicksCount']) ? $data['clicksCount'] : null;
@@ -370,5 +370,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/AbTestVersionStats.php b/lib/Model/AbTestVersionStats.php
index 7e930761..0691846a 100644
--- a/lib/Model/AbTestVersionStats.php
+++ b/lib/Model/AbTestVersionStats.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['versionA'] = isset($data['versionA']) ? $data['versionA'] : null;
         $this->container['versionB'] = isset($data['versionB']) ? $data['versionB'] : null;
@@ -338,5 +338,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/AddChildDomain.php b/lib/Model/AddChildDomain.php
index a47f8cf1..6a347207 100644
--- a/lib/Model/AddChildDomain.php
+++ b/lib/Model/AddChildDomain.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['domain'] = isset($data['domain']) ? $data['domain'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/AddContactToList.php b/lib/Model/AddContactToList.php
index 5f52693e..42004153 100644
--- a/lib/Model/AddContactToList.php
+++ b/lib/Model/AddContactToList.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['emails'] = isset($data['emails']) ? $data['emails'] : null;
         $this->container['ids'] = isset($data['ids']) ? $data['ids'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/AddCredits.php b/lib/Model/AddCredits.php
index 6144e98f..219ee1de 100644
--- a/lib/Model/AddCredits.php
+++ b/lib/Model/AddCredits.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['sms'] = isset($data['sms']) ? $data['sms'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/AllOfgetContactsContactsItems.php b/lib/Model/AllOfgetContactsContactsItems.php
index 584ee521..f2863eb6 100644
--- a/lib/Model/AllOfgetContactsContactsItems.php
+++ b/lib/Model/AllOfgetContactsContactsItems.php
@@ -159,7 +159,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/AllOfgetEmailCampaignsCampaignsItems.php b/lib/Model/AllOfgetEmailCampaignsCampaignsItems.php
index 3585a5a0..e4710fb1 100644
--- a/lib/Model/AllOfgetEmailCampaignsCampaignsItems.php
+++ b/lib/Model/AllOfgetEmailCampaignsCampaignsItems.php
@@ -174,7 +174,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
diff --git a/lib/Model/AuthenticateDomainModel.php b/lib/Model/AuthenticateDomainModel.php
index ad14e3e7..9d1e6060 100644
--- a/lib/Model/AuthenticateDomainModel.php
+++ b/lib/Model/AuthenticateDomainModel.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['domainName'] = isset($data['domainName']) ? $data['domainName'] : null;
         $this->container['message'] = isset($data['message']) ? $data['message'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/BlockDomain.php b/lib/Model/BlockDomain.php
index 427488fe..fd68b399 100644
--- a/lib/Model/BlockDomain.php
+++ b/lib/Model/BlockDomain.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['domain'] = isset($data['domain']) ? $data['domain'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body.php b/lib/Model/Body.php
index 0ad07174..a6500e1a 100644
--- a/lib/Model/Body.php
+++ b/lib/Model/Body.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['groupName'] = isset($data['groupName']) ? $data['groupName'] : null;
         $this->container['subAccountIds'] = isset($data['subAccountIds']) ? $data['subAccountIds'] : null;
@@ -334,5 +334,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body1.php b/lib/Model/Body1.php
index b1a96080..0bb2f179 100644
--- a/lib/Model/Body1.php
+++ b/lib/Model/Body1.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['groupName'] = isset($data['groupName']) ? $data['groupName'] : null;
         $this->container['subAccountIds'] = isset($data['subAccountIds']) ? $data['subAccountIds'] : null;
@@ -334,5 +334,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body10.php b/lib/Model/Body10.php
index 2e0f62fc..04de0619 100644
--- a/lib/Model/Body10.php
+++ b/lib/Model/Body10.php
@@ -200,7 +200,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['visitorId'] = isset($data['visitorId']) ? $data['visitorId'] : null;
         $this->container['text'] = isset($data['text']) ? $data['text'] : null;
@@ -457,5 +457,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body11.php b/lib/Model/Body11.php
index 0899cd01..bc6eb604 100644
--- a/lib/Model/Body11.php
+++ b/lib/Model/Body11.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['text'] = isset($data['text']) ? $data['text'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body12.php b/lib/Model/Body12.php
index 8905dbf7..3a557b17 100644
--- a/lib/Model/Body12.php
+++ b/lib/Model/Body12.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['visitorId'] = isset($data['visitorId']) ? $data['visitorId'] : null;
         $this->container['text'] = isset($data['text']) ? $data['text'] : null;
@@ -397,5 +397,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body13.php b/lib/Model/Body13.php
index 7a8f8d4e..37cb1ff1 100644
--- a/lib/Model/Body13.php
+++ b/lib/Model/Body13.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['text'] = isset($data['text']) ? $data['text'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body14.php b/lib/Model/Body14.php
index 9ec924d3..a2c5e700 100644
--- a/lib/Model/Body14.php
+++ b/lib/Model/Body14.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['agentId'] = isset($data['agentId']) ? $data['agentId'] : null;
         $this->container['receivedFrom'] = isset($data['receivedFrom']) ? $data['receivedFrom'] : null;
@@ -391,5 +391,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body2.php b/lib/Model/Body2.php
index f65c38fc..7b6fb2cc 100644
--- a/lib/Model/Body2.php
+++ b/lib/Model/Body2.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['attributes'] = isset($data['attributes']) ? $data['attributes'] : null;
@@ -364,5 +364,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body3.php b/lib/Model/Body3.php
index fc74d918..a8ea5333 100644
--- a/lib/Model/Body3.php
+++ b/lib/Model/Body3.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['attributes'] = isset($data['attributes']) ? $data['attributes'] : null;
@@ -361,5 +361,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body4.php b/lib/Model/Body4.php
index 70e53201..8cd3e2db 100644
--- a/lib/Model/Body4.php
+++ b/lib/Model/Body4.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['linkContactIds'] = isset($data['linkContactIds']) ? $data['linkContactIds'] : null;
         $this->container['unlinkContactIds'] = isset($data['unlinkContactIds']) ? $data['unlinkContactIds'] : null;
@@ -391,5 +391,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body5.php b/lib/Model/Body5.php
index d87bba68..9821c982 100644
--- a/lib/Model/Body5.php
+++ b/lib/Model/Body5.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['attributes'] = isset($data['attributes']) ? $data['attributes'] : null;
@@ -334,5 +334,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body6.php b/lib/Model/Body6.php
index 4175c72c..b8c1fecd 100644
--- a/lib/Model/Body6.php
+++ b/lib/Model/Body6.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['attributes'] = isset($data['attributes']) ? $data['attributes'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body7.php b/lib/Model/Body7.php
index 30616fc5..d178077b 100644
--- a/lib/Model/Body7.php
+++ b/lib/Model/Body7.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['linkContactIds'] = isset($data['linkContactIds']) ? $data['linkContactIds'] : null;
         $this->container['unlinkContactIds'] = isset($data['unlinkContactIds']) ? $data['unlinkContactIds'] : null;
@@ -391,5 +391,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body8.php b/lib/Model/Body8.php
index c4abdf76..3e78ba2e 100644
--- a/lib/Model/Body8.php
+++ b/lib/Model/Body8.php
@@ -225,7 +225,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['duration'] = isset($data['duration']) ? $data['duration'] : null;
@@ -619,5 +619,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Body9.php b/lib/Model/Body9.php
index 6f12e433..0ee5575b 100644
--- a/lib/Model/Body9.php
+++ b/lib/Model/Body9.php
@@ -220,7 +220,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['duration'] = isset($data['duration']) ? $data['duration'] : null;
@@ -571,5 +571,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/BodyVariablesItems.php b/lib/Model/BodyVariablesItems.php
index f5fa31c8..ca60cf59 100644
--- a/lib/Model/BodyVariablesItems.php
+++ b/lib/Model/BodyVariablesItems.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
     }
 
@@ -276,5 +276,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CompaniesList.php b/lib/Model/CompaniesList.php
index f263577d..41859c64 100644
--- a/lib/Model/CompaniesList.php
+++ b/lib/Model/CompaniesList.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['items'] = isset($data['items']) ? $data['items'] : null;
     }
@@ -302,5 +302,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Company.php b/lib/Model/Company.php
index f0a5b0c1..ae6cfbce 100644
--- a/lib/Model/Company.php
+++ b/lib/Model/Company.php
@@ -191,7 +191,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['attributes'] = isset($data['attributes']) ? $data['attributes'] : null;
@@ -392,5 +392,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CompanyAttributes.php b/lib/Model/CompanyAttributes.php
index 1ba5907c..1102fb06 100644
--- a/lib/Model/CompanyAttributes.php
+++ b/lib/Model/CompanyAttributes.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
     }
 
@@ -277,5 +277,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CompanyAttributesInner.php b/lib/Model/CompanyAttributesInner.php
index c41cc8a7..a281da8d 100644
--- a/lib/Model/CompanyAttributesInner.php
+++ b/lib/Model/CompanyAttributesInner.php
@@ -196,7 +196,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['internalName'] = isset($data['internalName']) ? $data['internalName'] : null;
         $this->container['label'] = isset($data['label']) ? $data['label'] : null;
@@ -422,5 +422,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/ComponentItems.php b/lib/Model/ComponentItems.php
index 69d5d34d..cd3bb37e 100644
--- a/lib/Model/ComponentItems.php
+++ b/lib/Model/ComponentItems.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['type'] = isset($data['type']) ? $data['type'] : null;
         $this->container['text'] = isset($data['text']) ? $data['text'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Contact.php b/lib/Model/Contact.php
index a000b886..97be5aab 100644
--- a/lib/Model/Contact.php
+++ b/lib/Model/Contact.php
@@ -211,7 +211,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['virtualNextTask'] = isset($data['virtualNextTask']) ? $data['virtualNextTask'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -451,6 +451,7 @@ public function setUpdatedAt($updatedAt)
      *
      * @return boolean
      */
+    #[\ReturnTypeWillChange]
     public function offsetExists($offset)
     {
         return isset($this->container[$offset]);
@@ -463,6 +464,7 @@ public function offsetExists($offset)
      *
      * @return mixed
      */
+    #[\ReturnTypeWillChange]
     public function offsetGet($offset)
     {
         return isset($this->container[$offset]) ? $this->container[$offset] : null;
@@ -476,6 +478,7 @@ public function offsetGet($offset)
      *
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function offsetSet($offset, $value)
     {
         if (is_null($offset)) {
@@ -492,6 +495,7 @@ public function offsetSet($offset, $value)
      *
      * @return void
      */
+    #[\ReturnTypeWillChange]
     public function offsetUnset($offset)
     {
         unset($this->container[$offset]);
@@ -514,5 +518,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/ContactErrorModel.php b/lib/Model/ContactErrorModel.php
index b3eb030e..2d9dd477 100644
--- a/lib/Model/ContactErrorModel.php
+++ b/lib/Model/ContactErrorModel.php
@@ -206,7 +206,7 @@ public function getCodeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['code'] = isset($data['code']) ? $data['code'] : null;
         $this->container['message'] = isset($data['message']) ? $data['message'] : null;
diff --git a/lib/Model/ConversationsMessage.php b/lib/Model/ConversationsMessage.php
index b1eb84a0..61a2606a 100644
--- a/lib/Model/ConversationsMessage.php
+++ b/lib/Model/ConversationsMessage.php
@@ -236,7 +236,7 @@ public function getTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['type'] = isset($data['type']) ? $data['type'] : null;
@@ -613,5 +613,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/ConversationsMessageFile.php b/lib/Model/ConversationsMessageFile.php
index ef207ef4..da44dbca 100644
--- a/lib/Model/ConversationsMessageFile.php
+++ b/lib/Model/ConversationsMessageFile.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['filename'] = isset($data['filename']) ? $data['filename'] : null;
         $this->container['size'] = isset($data['size']) ? $data['size'] : null;
@@ -430,5 +430,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/ConversationsMessageFileImageInfo.php b/lib/Model/ConversationsMessageFileImageInfo.php
index 2415cb49..fc1254d8 100644
--- a/lib/Model/ConversationsMessageFileImageInfo.php
+++ b/lib/Model/ConversationsMessageFileImageInfo.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['width'] = isset($data['width']) ? $data['width'] : null;
         $this->container['height'] = isset($data['height']) ? $data['height'] : null;
@@ -380,5 +380,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateApiKeyRequest.php b/lib/Model/CreateApiKeyRequest.php
index 79f81475..7286b0ae 100644
--- a/lib/Model/CreateApiKeyRequest.php
+++ b/lib/Model/CreateApiKeyRequest.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -334,5 +334,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateApiKeyResponse.php b/lib/Model/CreateApiKeyResponse.php
index 828b444f..2453bf93 100644
--- a/lib/Model/CreateApiKeyResponse.php
+++ b/lib/Model/CreateApiKeyResponse.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['status'] = isset($data['status']) ? $data['status'] : null;
         $this->container['key'] = isset($data['key']) ? $data['key'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateAttribute.php b/lib/Model/CreateAttribute.php
index a66178ac..2be54238 100644
--- a/lib/Model/CreateAttribute.php
+++ b/lib/Model/CreateAttribute.php
@@ -220,7 +220,7 @@ public function getTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['value'] = isset($data['value']) ? $data['value'] : null;
         $this->container['isRecurring'] = isset($data['isRecurring']) ? $data['isRecurring'] : null;
@@ -463,5 +463,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateAttributeEnumeration.php b/lib/Model/CreateAttributeEnumeration.php
index b9da3d2e..acd1fba6 100644
--- a/lib/Model/CreateAttributeEnumeration.php
+++ b/lib/Model/CreateAttributeEnumeration.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['value'] = isset($data['value']) ? $data['value'] : null;
         $this->container['label'] = isset($data['label']) ? $data['label'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateCategoryModel.php b/lib/Model/CreateCategoryModel.php
index 10995f64..b0d2f9da 100644
--- a/lib/Model/CreateCategoryModel.php
+++ b/lib/Model/CreateCategoryModel.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateChild.php b/lib/Model/CreateChild.php
index ceba8b69..e27b69c1 100644
--- a/lib/Model/CreateChild.php
+++ b/lib/Model/CreateChild.php
@@ -223,7 +223,7 @@ public function getLanguageAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['firstName'] = isset($data['firstName']) ? $data['firstName'] : null;
@@ -506,5 +506,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateContact.php b/lib/Model/CreateContact.php
index 00080daf..b9078acf 100644
--- a/lib/Model/CreateContact.php
+++ b/lib/Model/CreateContact.php
@@ -207,7 +207,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['extId'] = isset($data['extId']) ? $data['extId'] : null;
diff --git a/lib/Model/CreateCouponCollection.php b/lib/Model/CreateCouponCollection.php
index d489d57e..4823d390 100644
--- a/lib/Model/CreateCouponCollection.php
+++ b/lib/Model/CreateCouponCollection.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['defaultCoupon'] = isset($data['defaultCoupon']) ? $data['defaultCoupon'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateCoupons.php b/lib/Model/CreateCoupons.php
index d082036f..5309f02e 100644
--- a/lib/Model/CreateCoupons.php
+++ b/lib/Model/CreateCoupons.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['collectionId'] = isset($data['collectionId']) ? $data['collectionId'] : null;
         $this->container['coupons'] = isset($data['coupons']) ? $data['coupons'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateDoiContact.php b/lib/Model/CreateDoiContact.php
index c4df173f..05341258 100644
--- a/lib/Model/CreateDoiContact.php
+++ b/lib/Model/CreateDoiContact.php
@@ -200,7 +200,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['attributes'] = isset($data['attributes']) ? $data['attributes'] : null;
@@ -463,5 +463,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateDomain.php b/lib/Model/CreateDomain.php
index bc67da05..7cfa248d 100644
--- a/lib/Model/CreateDomain.php
+++ b/lib/Model/CreateDomain.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateDomainModel.php b/lib/Model/CreateDomainModel.php
index edc37568..15a4831f 100644
--- a/lib/Model/CreateDomainModel.php
+++ b/lib/Model/CreateDomainModel.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['domainName'] = isset($data['domainName']) ? $data['domainName'] : null;
@@ -394,5 +394,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateDomainModelDnsRecords.php b/lib/Model/CreateDomainModelDnsRecords.php
index 5ba39836..63931ace 100644
--- a/lib/Model/CreateDomainModelDnsRecords.php
+++ b/lib/Model/CreateDomainModelDnsRecords.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['dkimRecord'] = isset($data['dkimRecord']) ? $data['dkimRecord'] : null;
         $this->container['brevoCode'] = isset($data['brevoCode']) ? $data['brevoCode'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateDomainModelDnsRecordsDkimRecord.php b/lib/Model/CreateDomainModelDnsRecordsDkimRecord.php
index 83bfad16..df57dea1 100644
--- a/lib/Model/CreateDomainModelDnsRecordsDkimRecord.php
+++ b/lib/Model/CreateDomainModelDnsRecordsDkimRecord.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['type'] = isset($data['type']) ? $data['type'] : null;
         $this->container['value'] = isset($data['value']) ? $data['value'] : null;
@@ -391,5 +391,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateEmailCampaign.php b/lib/Model/CreateEmailCampaign.php
index 5bb10497..582eb9bf 100644
--- a/lib/Model/CreateEmailCampaign.php
+++ b/lib/Model/CreateEmailCampaign.php
@@ -340,7 +340,7 @@ public function getWinnerCriteriaAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['tag'] = isset($data['tag']) ? $data['tag'] : null;
         $this->container['sender'] = isset($data['sender']) ? $data['sender'] : null;
@@ -1287,5 +1287,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateEmailCampaignRecipients.php b/lib/Model/CreateEmailCampaignRecipients.php
index c4d1cb53..351eb9ed 100644
--- a/lib/Model/CreateEmailCampaignRecipients.php
+++ b/lib/Model/CreateEmailCampaignRecipients.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['exclusionListIds'] = isset($data['exclusionListIds']) ? $data['exclusionListIds'] : null;
         $this->container['listIds'] = isset($data['listIds']) ? $data['listIds'] : null;
@@ -362,5 +362,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateEmailCampaignSender.php b/lib/Model/CreateEmailCampaignSender.php
index 5b7185b5..308bab16 100644
--- a/lib/Model/CreateEmailCampaignSender.php
+++ b/lib/Model/CreateEmailCampaignSender.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -365,5 +365,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateExternalFeed.php b/lib/Model/CreateExternalFeed.php
index fa3fa2db..c935cb80 100644
--- a/lib/Model/CreateExternalFeed.php
+++ b/lib/Model/CreateExternalFeed.php
@@ -232,7 +232,7 @@ public function getAuthTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['url'] = isset($data['url']) ? $data['url'] : null;
@@ -597,5 +597,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateList.php b/lib/Model/CreateList.php
index 05a9f9fc..a24c3ebe 100644
--- a/lib/Model/CreateList.php
+++ b/lib/Model/CreateList.php
@@ -177,7 +177,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['folderId'] = isset($data['folderId']) ? $data['folderId'] : null;
diff --git a/lib/Model/CreateModel.php b/lib/Model/CreateModel.php
index 921fdd71..9a145014 100644
--- a/lib/Model/CreateModel.php
+++ b/lib/Model/CreateModel.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateProductModel.php b/lib/Model/CreateProductModel.php
index 4d475ea4..01613782 100644
--- a/lib/Model/CreateProductModel.php
+++ b/lib/Model/CreateProductModel.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateReseller.php b/lib/Model/CreateReseller.php
index e9cc84d1..0816f261 100644
--- a/lib/Model/CreateReseller.php
+++ b/lib/Model/CreateReseller.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['authKey'] = isset($data['authKey']) ? $data['authKey'] : null;
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
@@ -334,5 +334,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateSender.php b/lib/Model/CreateSender.php
index 99c6e861..21e623be 100644
--- a/lib/Model/CreateSender.php
+++ b/lib/Model/CreateSender.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -367,5 +367,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateSenderIps.php b/lib/Model/CreateSenderIps.php
index e2f5c77c..f22bcac4 100644
--- a/lib/Model/CreateSenderIps.php
+++ b/lib/Model/CreateSenderIps.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['ip'] = isset($data['ip']) ? $data['ip'] : null;
         $this->container['domain'] = isset($data['domain']) ? $data['domain'] : null;
@@ -383,5 +383,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateSenderModel.php b/lib/Model/CreateSenderModel.php
index d1c6d026..3a1ea0b0 100644
--- a/lib/Model/CreateSenderModel.php
+++ b/lib/Model/CreateSenderModel.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['spfError'] = isset($data['spfError']) ? $data['spfError'] : null;
@@ -364,5 +364,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateSmsCampaign.php b/lib/Model/CreateSmsCampaign.php
index af825495..a07dcf74 100644
--- a/lib/Model/CreateSmsCampaign.php
+++ b/lib/Model/CreateSmsCampaign.php
@@ -210,7 +210,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['sender'] = isset($data['sender']) ? $data['sender'] : null;
@@ -528,5 +528,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateSmsCampaignRecipients.php b/lib/Model/CreateSmsCampaignRecipients.php
index 080776ad..1580f3c9 100644
--- a/lib/Model/CreateSmsCampaignRecipients.php
+++ b/lib/Model/CreateSmsCampaignRecipients.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['listIds'] = isset($data['listIds']) ? $data['listIds'] : null;
         $this->container['exclusionListIds'] = isset($data['exclusionListIds']) ? $data['exclusionListIds'] : null;
@@ -334,5 +334,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateSmtpEmail.php b/lib/Model/CreateSmtpEmail.php
index 5f2a3a50..9ba3c6fe 100644
--- a/lib/Model/CreateSmtpEmail.php
+++ b/lib/Model/CreateSmtpEmail.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['messageId'] = isset($data['messageId']) ? $data['messageId'] : null;
         $this->container['messageIds'] = isset($data['messageIds']) ? $data['messageIds'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateSmtpTemplate.php b/lib/Model/CreateSmtpTemplate.php
index 1953e4f7..9d007102 100644
--- a/lib/Model/CreateSmtpTemplate.php
+++ b/lib/Model/CreateSmtpTemplate.php
@@ -220,7 +220,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['tag'] = isset($data['tag']) ? $data['tag'] : null;
         $this->container['sender'] = isset($data['sender']) ? $data['sender'] : null;
@@ -580,5 +580,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateSmtpTemplateSender.php b/lib/Model/CreateSmtpTemplateSender.php
index e208b3a1..4a753fc8 100644
--- a/lib/Model/CreateSmtpTemplateSender.php
+++ b/lib/Model/CreateSmtpTemplateSender.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -362,5 +362,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateSubAccount.php b/lib/Model/CreateSubAccount.php
index ee0fbb60..29745ab7 100644
--- a/lib/Model/CreateSubAccount.php
+++ b/lib/Model/CreateSubAccount.php
@@ -213,7 +213,7 @@ public function getLanguageAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['companyName'] = isset($data['companyName']) ? $data['companyName'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -437,5 +437,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateSubAccountResponse.php b/lib/Model/CreateSubAccountResponse.php
index f5426957..b601e278 100644
--- a/lib/Model/CreateSubAccountResponse.php
+++ b/lib/Model/CreateSubAccountResponse.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateUpdateBatchCategory.php b/lib/Model/CreateUpdateBatchCategory.php
index 900b9aaa..40be21a0 100644
--- a/lib/Model/CreateUpdateBatchCategory.php
+++ b/lib/Model/CreateUpdateBatchCategory.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['categories'] = isset($data['categories']) ? $data['categories'] : null;
         $this->container['updateEnabled'] = isset($data['updateEnabled']) ? $data['updateEnabled'] : null;
@@ -334,5 +334,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateUpdateBatchCategoryModel.php b/lib/Model/CreateUpdateBatchCategoryModel.php
index 5777db14..aaddf895 100644
--- a/lib/Model/CreateUpdateBatchCategoryModel.php
+++ b/lib/Model/CreateUpdateBatchCategoryModel.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['createdCount'] = isset($data['createdCount']) ? $data['createdCount'] : null;
         $this->container['updatedCount'] = isset($data['updatedCount']) ? $data['updatedCount'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateUpdateBatchProducts.php b/lib/Model/CreateUpdateBatchProducts.php
index 082c8d2a..36a2e2de 100644
--- a/lib/Model/CreateUpdateBatchProducts.php
+++ b/lib/Model/CreateUpdateBatchProducts.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['products'] = isset($data['products']) ? $data['products'] : null;
         $this->container['updateEnabled'] = isset($data['updateEnabled']) ? $data['updateEnabled'] : null;
@@ -334,5 +334,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateUpdateBatchProductsModel.php b/lib/Model/CreateUpdateBatchProductsModel.php
index e11a883a..ee8a3cf1 100644
--- a/lib/Model/CreateUpdateBatchProductsModel.php
+++ b/lib/Model/CreateUpdateBatchProductsModel.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['createdCount'] = isset($data['createdCount']) ? $data['createdCount'] : null;
         $this->container['updatedCount'] = isset($data['updatedCount']) ? $data['updatedCount'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateUpdateCategories.php b/lib/Model/CreateUpdateCategories.php
index 7aa5c112..ddcc62d1 100644
--- a/lib/Model/CreateUpdateCategories.php
+++ b/lib/Model/CreateUpdateCategories.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -394,5 +394,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateUpdateCategory.php b/lib/Model/CreateUpdateCategory.php
index 3bfdcf4d..9d307b5b 100644
--- a/lib/Model/CreateUpdateCategory.php
+++ b/lib/Model/CreateUpdateCategory.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -424,5 +424,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateUpdateContactModel.php b/lib/Model/CreateUpdateContactModel.php
index 19a62849..aa715d2c 100644
--- a/lib/Model/CreateUpdateContactModel.php
+++ b/lib/Model/CreateUpdateContactModel.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateUpdateFolder.php b/lib/Model/CreateUpdateFolder.php
index b3cf1dde..3c8e98ef 100644
--- a/lib/Model/CreateUpdateFolder.php
+++ b/lib/Model/CreateUpdateFolder.php
@@ -172,7 +172,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
     }
diff --git a/lib/Model/CreateUpdateProduct.php b/lib/Model/CreateUpdateProduct.php
index 8fd883d5..3b4ef366 100644
--- a/lib/Model/CreateUpdateProduct.php
+++ b/lib/Model/CreateUpdateProduct.php
@@ -225,7 +225,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -607,5 +607,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateUpdateProducts.php b/lib/Model/CreateUpdateProducts.php
index d519d058..123028c3 100644
--- a/lib/Model/CreateUpdateProducts.php
+++ b/lib/Model/CreateUpdateProducts.php
@@ -220,7 +220,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -577,5 +577,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateWebhook.php b/lib/Model/CreateWebhook.php
index 4f93c079..910ba2a9 100644
--- a/lib/Model/CreateWebhook.php
+++ b/lib/Model/CreateWebhook.php
@@ -272,7 +272,7 @@ public function getTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['url'] = isset($data['url']) ? $data['url'] : null;
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
@@ -605,5 +605,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateWhatsAppCampaign.php b/lib/Model/CreateWhatsAppCampaign.php
index d6faa211..dde29676 100644
--- a/lib/Model/CreateWhatsAppCampaign.php
+++ b/lib/Model/CreateWhatsAppCampaign.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['templateId'] = isset($data['templateId']) ? $data['templateId'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateWhatsAppCampaignRecipients.php b/lib/Model/CreateWhatsAppCampaignRecipients.php
index 78311df6..152ca5c8 100644
--- a/lib/Model/CreateWhatsAppCampaignRecipients.php
+++ b/lib/Model/CreateWhatsAppCampaignRecipients.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['excludedListIds'] = isset($data['excludedListIds']) ? $data['excludedListIds'] : null;
         $this->container['listIds'] = isset($data['listIds']) ? $data['listIds'] : null;
@@ -362,5 +362,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreateWhatsAppTemplate.php b/lib/Model/CreateWhatsAppTemplate.php
index 73d7f8a9..84c95c5d 100644
--- a/lib/Model/CreateWhatsAppTemplate.php
+++ b/lib/Model/CreateWhatsAppTemplate.php
@@ -235,7 +235,7 @@ public function getSourceAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['language'] = isset($data['language']) ? $data['language'] : null;
@@ -557,5 +557,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreatedBatchId.php b/lib/Model/CreatedBatchId.php
index 28812b8a..b64dc35b 100644
--- a/lib/Model/CreatedBatchId.php
+++ b/lib/Model/CreatedBatchId.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['batchId'] = isset($data['batchId']) ? $data['batchId'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/CreatedProcessId.php b/lib/Model/CreatedProcessId.php
index 96341dff..a1603764 100644
--- a/lib/Model/CreatedProcessId.php
+++ b/lib/Model/CreatedProcessId.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['processId'] = isset($data['processId']) ? $data['processId'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Deal.php b/lib/Model/Deal.php
index a3153594..03c90756 100644
--- a/lib/Model/Deal.php
+++ b/lib/Model/Deal.php
@@ -191,7 +191,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['attributes'] = isset($data['attributes']) ? $data['attributes'] : null;
@@ -392,5 +392,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/DealAttributes.php b/lib/Model/DealAttributes.php
index 1ff6bf91..f52b058e 100644
--- a/lib/Model/DealAttributes.php
+++ b/lib/Model/DealAttributes.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
     }
 
@@ -277,5 +277,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/DealAttributesInner.php b/lib/Model/DealAttributesInner.php
index 23144bea..8caa00e7 100644
--- a/lib/Model/DealAttributesInner.php
+++ b/lib/Model/DealAttributesInner.php
@@ -196,7 +196,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['internalName'] = isset($data['internalName']) ? $data['internalName'] : null;
         $this->container['label'] = isset($data['label']) ? $data['label'] : null;
@@ -422,5 +422,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/DealsList.php b/lib/Model/DealsList.php
index f517903c..bb63ffb5 100644
--- a/lib/Model/DealsList.php
+++ b/lib/Model/DealsList.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['items'] = isset($data['items']) ? $data['items'] : null;
     }
@@ -302,5 +302,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/DeleteHardbounces.php b/lib/Model/DeleteHardbounces.php
index fd256f53..0f4a67d1 100644
--- a/lib/Model/DeleteHardbounces.php
+++ b/lib/Model/DeleteHardbounces.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['startDate'] = isset($data['startDate']) ? $data['startDate'] : null;
         $this->container['endDate'] = isset($data['endDate']) ? $data['endDate'] : null;
@@ -361,5 +361,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/EmailExportRecipients.php b/lib/Model/EmailExportRecipients.php
index 4489fd98..eb394ef3 100644
--- a/lib/Model/EmailExportRecipients.php
+++ b/lib/Model/EmailExportRecipients.php
@@ -207,7 +207,7 @@ public function getRecipientsTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['notifyURL'] = isset($data['notifyURL']) ? $data['notifyURL'] : null;
         $this->container['recipientsType'] = isset($data['recipientsType']) ? $data['recipientsType'] : null;
@@ -378,5 +378,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Event.php b/lib/Model/Event.php
index 8335cfe5..36af64cc 100644
--- a/lib/Model/Event.php
+++ b/lib/Model/Event.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['eventName'] = isset($data['eventName']) ? $data['eventName'] : null;
         $this->container['eventDate'] = isset($data['eventDate']) ? $data['eventDate'] : null;
@@ -427,5 +427,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/EventIdentifiers.php b/lib/Model/EventIdentifiers.php
index a71997e5..f5fa43c3 100644
--- a/lib/Model/EventIdentifiers.php
+++ b/lib/Model/EventIdentifiers.php
@@ -196,7 +196,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['emailId'] = isset($data['emailId']) ? $data['emailId'] : null;
         $this->container['phoneId'] = isset($data['phoneId']) ? $data['phoneId'] : null;
@@ -422,5 +422,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/ExportWebhooksHistory.php b/lib/Model/ExportWebhooksHistory.php
index 4d368448..87490f71 100644
--- a/lib/Model/ExportWebhooksHistory.php
+++ b/lib/Model/ExportWebhooksHistory.php
@@ -280,7 +280,7 @@ public function getEventAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['days'] = isset($data['days']) ? $data['days'] : null;
         $this->container['startDate'] = isset($data['startDate']) ? $data['startDate'] : null;
@@ -674,5 +674,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/FileData.php b/lib/Model/FileData.php
index 7b7ef4f2..5d269b6a 100644
--- a/lib/Model/FileData.php
+++ b/lib/Model/FileData.php
@@ -226,7 +226,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['url'] = isset($data['url']) ? $data['url'] : null;
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
@@ -578,5 +578,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/FileDownloadableLink.php b/lib/Model/FileDownloadableLink.php
index 003c6c6f..e8cc125a 100644
--- a/lib/Model/FileDownloadableLink.php
+++ b/lib/Model/FileDownloadableLink.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['fileUrl'] = isset($data['fileUrl']) ? $data['fileUrl'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/FileList.php b/lib/Model/FileList.php
index 9fe810fb..8652e23c 100644
--- a/lib/Model/FileList.php
+++ b/lib/Model/FileList.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
     }
 
@@ -277,5 +277,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetAccount.php b/lib/Model/GetAccount.php
index fe969b48..66ccf34f 100644
--- a/lib/Model/GetAccount.php
+++ b/lib/Model/GetAccount.php
@@ -177,7 +177,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
@@ -361,5 +361,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetAccountActivity.php b/lib/Model/GetAccountActivity.php
index 6d48d87c..679b56ae 100644
--- a/lib/Model/GetAccountActivity.php
+++ b/lib/Model/GetAccountActivity.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['logs'] = isset($data['logs']) ? $data['logs'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetAccountActivityLogs.php b/lib/Model/GetAccountActivityLogs.php
index 4e4baa13..0047c7cd 100644
--- a/lib/Model/GetAccountActivityLogs.php
+++ b/lib/Model/GetAccountActivityLogs.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['action'] = isset($data['action']) ? $data['action'] : null;
         $this->container['date'] = isset($data['date']) ? $data['date'] : null;
@@ -436,5 +436,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetAccountMarketingAutomation.php b/lib/Model/GetAccountMarketingAutomation.php
index fa2ee059..6afb5d70 100644
--- a/lib/Model/GetAccountMarketingAutomation.php
+++ b/lib/Model/GetAccountMarketingAutomation.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['key'] = isset($data['key']) ? $data['key'] : null;
         $this->container['enabled'] = isset($data['enabled']) ? $data['enabled'] : null;
@@ -334,5 +334,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetAccountPlan.php b/lib/Model/GetAccountPlan.php
index caadcb88..1ac4d465 100644
--- a/lib/Model/GetAccountPlan.php
+++ b/lib/Model/GetAccountPlan.php
@@ -234,7 +234,7 @@ public function getCreditsTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['type'] = isset($data['type']) ? $data['type'] : null;
         $this->container['creditsType'] = isset($data['creditsType']) ? $data['creditsType'] : null;
@@ -528,5 +528,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetAccountRelay.php b/lib/Model/GetAccountRelay.php
index 7af1aa44..0123539f 100644
--- a/lib/Model/GetAccountRelay.php
+++ b/lib/Model/GetAccountRelay.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['enabled'] = isset($data['enabled']) ? $data['enabled'] : null;
         $this->container['data'] = isset($data['data']) ? $data['data'] : null;
@@ -338,5 +338,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetAccountRelayData.php b/lib/Model/GetAccountRelayData.php
index c9ef3b90..b3b419f8 100644
--- a/lib/Model/GetAccountRelayData.php
+++ b/lib/Model/GetAccountRelayData.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['userName'] = isset($data['userName']) ? $data['userName'] : null;
         $this->container['relay'] = isset($data['relay']) ? $data['relay'] : null;
@@ -371,5 +371,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetAggregatedReport.php b/lib/Model/GetAggregatedReport.php
index 3ab89d2a..da2df6ed 100644
--- a/lib/Model/GetAggregatedReport.php
+++ b/lib/Model/GetAggregatedReport.php
@@ -235,7 +235,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['range'] = isset($data['range']) ? $data['range'] : null;
         $this->container['requests'] = isset($data['requests']) ? $data['requests'] : null;
@@ -661,5 +661,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetAllExternalFeeds.php b/lib/Model/GetAllExternalFeeds.php
index 5d2a4d96..490c769a 100644
--- a/lib/Model/GetAllExternalFeeds.php
+++ b/lib/Model/GetAllExternalFeeds.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
         $this->container['feeds'] = isset($data['feeds']) ? $data['feeds'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetAllExternalFeedsFeeds.php b/lib/Model/GetAllExternalFeedsFeeds.php
index fa998bd6..0fdbf70f 100644
--- a/lib/Model/GetAllExternalFeedsFeeds.php
+++ b/lib/Model/GetAllExternalFeedsFeeds.php
@@ -247,7 +247,7 @@ public function getAuthTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -708,5 +708,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetAttributes.php b/lib/Model/GetAttributes.php
index 6be1d69a..1d30c80f 100644
--- a/lib/Model/GetAttributes.php
+++ b/lib/Model/GetAttributes.php
@@ -172,7 +172,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['attributes'] = isset($data['attributes']) ? $data['attributes'] : null;
     }
diff --git a/lib/Model/GetAttributesAttributes.php b/lib/Model/GetAttributesAttributes.php
index bb92fc00..3a394a3d 100644
--- a/lib/Model/GetAttributesAttributes.php
+++ b/lib/Model/GetAttributesAttributes.php
@@ -237,7 +237,7 @@ public function getTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['category'] = isset($data['category']) ? $data['category'] : null;
@@ -503,5 +503,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetAttributesEnumeration.php b/lib/Model/GetAttributesEnumeration.php
index 1f2b9d39..4a95d726 100644
--- a/lib/Model/GetAttributesEnumeration.php
+++ b/lib/Model/GetAttributesEnumeration.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['value'] = isset($data['value']) ? $data['value'] : null;
         $this->container['label'] = isset($data['label']) ? $data['label'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetBlockedDomains.php b/lib/Model/GetBlockedDomains.php
index a2e58081..bc881780 100644
--- a/lib/Model/GetBlockedDomains.php
+++ b/lib/Model/GetBlockedDomains.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['domains'] = isset($data['domains']) ? $data['domains'] : null;
     }
@@ -305,5 +305,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetCampaignRecipients.php b/lib/Model/GetCampaignRecipients.php
index 70bc51a5..9b578707 100644
--- a/lib/Model/GetCampaignRecipients.php
+++ b/lib/Model/GetCampaignRecipients.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['lists'] = isset($data['lists']) ? $data['lists'] : null;
         $this->container['exclusionLists'] = isset($data['exclusionLists']) ? $data['exclusionLists'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetCampaignStats.php b/lib/Model/GetCampaignStats.php
index 73b0cb55..8330eac2 100644
--- a/lib/Model/GetCampaignStats.php
+++ b/lib/Model/GetCampaignStats.php
@@ -252,7 +252,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['listId'] = isset($data['listId']) ? $data['listId'] : null;
         $this->container['uniqueClicks'] = isset($data['uniqueClicks']) ? $data['uniqueClicks'] : null;
diff --git a/lib/Model/GetCategories.php b/lib/Model/GetCategories.php
index 596ab127..bd190991 100644
--- a/lib/Model/GetCategories.php
+++ b/lib/Model/GetCategories.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['categories'] = isset($data['categories']) ? $data['categories'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetCategoryDetails.php b/lib/Model/GetCategoryDetails.php
index 0b4d072b..16273731 100644
--- a/lib/Model/GetCategoryDetails.php
+++ b/lib/Model/GetCategoryDetails.php
@@ -200,7 +200,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -463,5 +463,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetChildAccountCreationStatus.php b/lib/Model/GetChildAccountCreationStatus.php
index 33d88218..16e03db0 100644
--- a/lib/Model/GetChildAccountCreationStatus.php
+++ b/lib/Model/GetChildAccountCreationStatus.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['childAccountCreated'] = isset($data['childAccountCreated']) ? $data['childAccountCreated'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetChildDomain.php b/lib/Model/GetChildDomain.php
index 0fe663a9..75daa057 100644
--- a/lib/Model/GetChildDomain.php
+++ b/lib/Model/GetChildDomain.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['domain'] = isset($data['domain']) ? $data['domain'] : null;
         $this->container['active'] = isset($data['active']) ? $data['active'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetChildDomains.php b/lib/Model/GetChildDomains.php
index b54947fa..aa04641c 100644
--- a/lib/Model/GetChildDomains.php
+++ b/lib/Model/GetChildDomains.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
     }
 
@@ -276,5 +276,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetChildInfo.php b/lib/Model/GetChildInfo.php
index 0b909b70..aa87c49a 100644
--- a/lib/Model/GetChildInfo.php
+++ b/lib/Model/GetChildInfo.php
@@ -187,7 +187,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
@@ -418,5 +418,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetChildInfoApiKeys.php b/lib/Model/GetChildInfoApiKeys.php
index 63fd4075..25c2ebf9 100644
--- a/lib/Model/GetChildInfoApiKeys.php
+++ b/lib/Model/GetChildInfoApiKeys.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['v2'] = isset($data['v2']) ? $data['v2'] : null;
         $this->container['v3'] = isset($data['v3']) ? $data['v3'] : null;
@@ -335,5 +335,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetChildInfoApiKeysV2.php b/lib/Model/GetChildInfoApiKeysV2.php
index 4215b8ae..82111f0a 100644
--- a/lib/Model/GetChildInfoApiKeysV2.php
+++ b/lib/Model/GetChildInfoApiKeysV2.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['key'] = isset($data['key']) ? $data['key'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetChildInfoApiKeysV3.php b/lib/Model/GetChildInfoApiKeysV3.php
index 8b58a1f3..4f5302b2 100644
--- a/lib/Model/GetChildInfoApiKeysV3.php
+++ b/lib/Model/GetChildInfoApiKeysV3.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['key'] = isset($data['key']) ? $data['key'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetChildInfoCredits.php b/lib/Model/GetChildInfoCredits.php
index b79dd86e..e123da68 100644
--- a/lib/Model/GetChildInfoCredits.php
+++ b/lib/Model/GetChildInfoCredits.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['emailCredits'] = isset($data['emailCredits']) ? $data['emailCredits'] : null;
         $this->container['smsCredits'] = isset($data['smsCredits']) ? $data['smsCredits'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetChildInfoStatistics.php b/lib/Model/GetChildInfoStatistics.php
index 730f10dc..fe4722f3 100644
--- a/lib/Model/GetChildInfoStatistics.php
+++ b/lib/Model/GetChildInfoStatistics.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['previousMonthTotalSent'] = isset($data['previousMonthTotalSent']) ? $data['previousMonthTotalSent'] : null;
         $this->container['currentMonthTotalSent'] = isset($data['currentMonthTotalSent']) ? $data['currentMonthTotalSent'] : null;
@@ -362,5 +362,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetChildrenList.php b/lib/Model/GetChildrenList.php
index 0d480628..b0f0a067 100644
--- a/lib/Model/GetChildrenList.php
+++ b/lib/Model/GetChildrenList.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['children'] = isset($data['children']) ? $data['children'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetClient.php b/lib/Model/GetClient.php
index 53d7b2fe..15c7bb7b 100644
--- a/lib/Model/GetClient.php
+++ b/lib/Model/GetClient.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['firstName'] = isset($data['firstName']) ? $data['firstName'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetContactCampaignStats.php b/lib/Model/GetContactCampaignStats.php
index 963af446..7a88fdfe 100644
--- a/lib/Model/GetContactCampaignStats.php
+++ b/lib/Model/GetContactCampaignStats.php
@@ -216,7 +216,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['messagesSent'] = isset($data['messagesSent']) ? $data['messagesSent'] : null;
         $this->container['hardBounces'] = isset($data['hardBounces']) ? $data['hardBounces'] : null;
@@ -542,5 +542,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetContactCampaignStatsClicked.php b/lib/Model/GetContactCampaignStatsClicked.php
index 8dc1d586..37e8b2a8 100644
--- a/lib/Model/GetContactCampaignStatsClicked.php
+++ b/lib/Model/GetContactCampaignStatsClicked.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['campaignId'] = isset($data['campaignId']) ? $data['campaignId'] : null;
         $this->container['links'] = isset($data['links']) ? $data['links'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetContactCampaignStatsOpened.php b/lib/Model/GetContactCampaignStatsOpened.php
index fd17f298..88b12405 100644
--- a/lib/Model/GetContactCampaignStatsOpened.php
+++ b/lib/Model/GetContactCampaignStatsOpened.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['campaignId'] = isset($data['campaignId']) ? $data['campaignId'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetContactCampaignStatsTransacAttributes.php b/lib/Model/GetContactCampaignStatsTransacAttributes.php
index e070a8f6..6e1f79b0 100644
--- a/lib/Model/GetContactCampaignStatsTransacAttributes.php
+++ b/lib/Model/GetContactCampaignStatsTransacAttributes.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['orderDate'] = isset($data['orderDate']) ? $data['orderDate'] : null;
         $this->container['orderPrice'] = isset($data['orderPrice']) ? $data['orderPrice'] : null;
@@ -370,5 +370,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetContactCampaignStatsUnsubscriptions.php b/lib/Model/GetContactCampaignStatsUnsubscriptions.php
index 801f31db..aa038da9 100644
--- a/lib/Model/GetContactCampaignStatsUnsubscriptions.php
+++ b/lib/Model/GetContactCampaignStatsUnsubscriptions.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['userUnsubscription'] = isset($data['userUnsubscription']) ? $data['userUnsubscription'] : null;
         $this->container['adminUnsubscription'] = isset($data['adminUnsubscription']) ? $data['adminUnsubscription'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetContactDetails.php b/lib/Model/GetContactDetails.php
index ee62408f..29656e6f 100644
--- a/lib/Model/GetContactDetails.php
+++ b/lib/Model/GetContactDetails.php
@@ -212,7 +212,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
diff --git a/lib/Model/GetContacts.php b/lib/Model/GetContacts.php
index 80321f81..62987da6 100644
--- a/lib/Model/GetContacts.php
+++ b/lib/Model/GetContacts.php
@@ -177,7 +177,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['contacts'] = isset($data['contacts']) ? $data['contacts'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
diff --git a/lib/Model/GetCorporateInvitedUsersList.php b/lib/Model/GetCorporateInvitedUsersList.php
index 989c089a..bf546e75 100644
--- a/lib/Model/GetCorporateInvitedUsersList.php
+++ b/lib/Model/GetCorporateInvitedUsersList.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['users'] = isset($data['users']) ? $data['users'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetCorporateInvitedUsersListFeatureAccess.php b/lib/Model/GetCorporateInvitedUsersListFeatureAccess.php
index 38544b24..3718ebd4 100644
--- a/lib/Model/GetCorporateInvitedUsersListFeatureAccess.php
+++ b/lib/Model/GetCorporateInvitedUsersListFeatureAccess.php
@@ -191,7 +191,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['userManagement'] = isset($data['userManagement']) ? $data['userManagement'] : null;
         $this->container['apiKeys'] = isset($data['apiKeys']) ? $data['apiKeys'] : null;
@@ -392,5 +392,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetCorporateInvitedUsersListGroups.php b/lib/Model/GetCorporateInvitedUsersListGroups.php
index c6c882b0..9ca2b6be 100644
--- a/lib/Model/GetCorporateInvitedUsersListGroups.php
+++ b/lib/Model/GetCorporateInvitedUsersListGroups.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetCorporateInvitedUsersListUsers.php b/lib/Model/GetCorporateInvitedUsersListUsers.php
index 1bb9caea..53790245 100644
--- a/lib/Model/GetCorporateInvitedUsersListUsers.php
+++ b/lib/Model/GetCorporateInvitedUsersListUsers.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['groups'] = isset($data['groups']) ? $data['groups'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -436,5 +436,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetCouponCollection.php b/lib/Model/GetCouponCollection.php
index 69d4b472..c30a7285 100644
--- a/lib/Model/GetCouponCollection.php
+++ b/lib/Model/GetCouponCollection.php
@@ -200,7 +200,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -469,5 +469,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetDeviceBrowserStats.php b/lib/Model/GetDeviceBrowserStats.php
index 81a3e75a..62fe6757 100644
--- a/lib/Model/GetDeviceBrowserStats.php
+++ b/lib/Model/GetDeviceBrowserStats.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['clickers'] = isset($data['clickers']) ? $data['clickers'] : null;
         $this->container['uniqueClicks'] = isset($data['uniqueClicks']) ? $data['uniqueClicks'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetDomainConfigurationModel.php b/lib/Model/GetDomainConfigurationModel.php
index 52ee44be..c92410ef 100644
--- a/lib/Model/GetDomainConfigurationModel.php
+++ b/lib/Model/GetDomainConfigurationModel.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['domain'] = isset($data['domain']) ? $data['domain'] : null;
         $this->container['verified'] = isset($data['verified']) ? $data['verified'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetDomainsList.php b/lib/Model/GetDomainsList.php
index 1ed1db7f..743a5aa6 100644
--- a/lib/Model/GetDomainsList.php
+++ b/lib/Model/GetDomainsList.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['domains'] = isset($data['domains']) ? $data['domains'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetDomainsListDomains.php b/lib/Model/GetDomainsListDomains.php
index 27d25bf3..183a0b38 100644
--- a/lib/Model/GetDomainsListDomains.php
+++ b/lib/Model/GetDomainsListDomains.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['domainName'] = isset($data['domainName']) ? $data['domainName'] : null;
@@ -433,5 +433,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetEmailEventReport.php b/lib/Model/GetEmailEventReport.php
index 47d443e0..95d2dd25 100644
--- a/lib/Model/GetEmailEventReport.php
+++ b/lib/Model/GetEmailEventReport.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['events'] = isset($data['events']) ? $data['events'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetEmailEventReportEvents.php b/lib/Model/GetEmailEventReportEvents.php
index ccaef2f9..2ceb5b60 100644
--- a/lib/Model/GetEmailEventReportEvents.php
+++ b/lib/Model/GetEmailEventReportEvents.php
@@ -264,7 +264,7 @@ public function getEventAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['date'] = isset($data['date']) ? $data['date'] : null;
@@ -669,5 +669,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedCampaignStats.php b/lib/Model/GetExtendedCampaignStats.php
index efe202a8..ecd27643 100644
--- a/lib/Model/GetExtendedCampaignStats.php
+++ b/lib/Model/GetExtendedCampaignStats.php
@@ -210,7 +210,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['globalStats'] = isset($data['globalStats']) ? $data['globalStats'] : null;
         $this->container['campaignStats'] = isset($data['campaignStats']) ? $data['campaignStats'] : null;
@@ -535,5 +535,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedCampaignStatsGlobalStats.php b/lib/Model/GetExtendedCampaignStatsGlobalStats.php
index 03d1ced3..8ceb092e 100644
--- a/lib/Model/GetExtendedCampaignStatsGlobalStats.php
+++ b/lib/Model/GetExtendedCampaignStatsGlobalStats.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
     }
 
@@ -277,5 +277,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedClient.php b/lib/Model/GetExtendedClient.php
index a4eb9830..fc8f8c33 100644
--- a/lib/Model/GetExtendedClient.php
+++ b/lib/Model/GetExtendedClient.php
@@ -167,7 +167,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
@@ -298,5 +298,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedClientAddress.php b/lib/Model/GetExtendedClientAddress.php
index 7b4691f5..734d2c2a 100644
--- a/lib/Model/GetExtendedClientAddress.php
+++ b/lib/Model/GetExtendedClientAddress.php
@@ -191,7 +191,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['street'] = isset($data['street']) ? $data['street'] : null;
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
@@ -404,5 +404,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedContactDetails.php b/lib/Model/GetExtendedContactDetails.php
index 6651b44d..cca52969 100644
--- a/lib/Model/GetExtendedContactDetails.php
+++ b/lib/Model/GetExtendedContactDetails.php
@@ -221,7 +221,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
@@ -599,5 +599,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedContactDetailsStatistics.php b/lib/Model/GetExtendedContactDetailsStatistics.php
index f5f05bec..7386dd6b 100644
--- a/lib/Model/GetExtendedContactDetailsStatistics.php
+++ b/lib/Model/GetExtendedContactDetailsStatistics.php
@@ -216,7 +216,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['messagesSent'] = isset($data['messagesSent']) ? $data['messagesSent'] : null;
         $this->container['hardBounces'] = isset($data['hardBounces']) ? $data['hardBounces'] : null;
@@ -542,5 +542,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedContactDetailsStatisticsClicked.php b/lib/Model/GetExtendedContactDetailsStatisticsClicked.php
index ad3fbe32..1dc20ec6 100644
--- a/lib/Model/GetExtendedContactDetailsStatisticsClicked.php
+++ b/lib/Model/GetExtendedContactDetailsStatisticsClicked.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['campaignId'] = isset($data['campaignId']) ? $data['campaignId'] : null;
         $this->container['links'] = isset($data['links']) ? $data['links'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedContactDetailsStatisticsDelivered.php b/lib/Model/GetExtendedContactDetailsStatisticsDelivered.php
index 42aeeec4..c71f39d1 100644
--- a/lib/Model/GetExtendedContactDetailsStatisticsDelivered.php
+++ b/lib/Model/GetExtendedContactDetailsStatisticsDelivered.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['campaignId'] = isset($data['campaignId']) ? $data['campaignId'] : null;
         $this->container['eventTime'] = isset($data['eventTime']) ? $data['eventTime'] : null;
@@ -333,5 +333,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedContactDetailsStatisticsLinks.php b/lib/Model/GetExtendedContactDetailsStatisticsLinks.php
index 7365eb90..18dc53ca 100644
--- a/lib/Model/GetExtendedContactDetailsStatisticsLinks.php
+++ b/lib/Model/GetExtendedContactDetailsStatisticsLinks.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
         $this->container['eventTime'] = isset($data['eventTime']) ? $data['eventTime'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedContactDetailsStatisticsMessagesSent.php b/lib/Model/GetExtendedContactDetailsStatisticsMessagesSent.php
index be2cdac3..ca2b3bd6 100644
--- a/lib/Model/GetExtendedContactDetailsStatisticsMessagesSent.php
+++ b/lib/Model/GetExtendedContactDetailsStatisticsMessagesSent.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['campaignId'] = isset($data['campaignId']) ? $data['campaignId'] : null;
         $this->container['eventTime'] = isset($data['eventTime']) ? $data['eventTime'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedContactDetailsStatisticsOpened.php b/lib/Model/GetExtendedContactDetailsStatisticsOpened.php
index 00599ef8..d5f7f603 100644
--- a/lib/Model/GetExtendedContactDetailsStatisticsOpened.php
+++ b/lib/Model/GetExtendedContactDetailsStatisticsOpened.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['campaignId'] = isset($data['campaignId']) ? $data['campaignId'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedContactDetailsStatisticsUnsubscriptions.php b/lib/Model/GetExtendedContactDetailsStatisticsUnsubscriptions.php
index 0105dec2..d01c841c 100644
--- a/lib/Model/GetExtendedContactDetailsStatisticsUnsubscriptions.php
+++ b/lib/Model/GetExtendedContactDetailsStatisticsUnsubscriptions.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['userUnsubscription'] = isset($data['userUnsubscription']) ? $data['userUnsubscription'] : null;
         $this->container['adminUnsubscription'] = isset($data['adminUnsubscription']) ? $data['adminUnsubscription'] : null;
@@ -338,5 +338,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedContactDetailsStatisticsUnsubscriptionsAdminUnsubscription.php b/lib/Model/GetExtendedContactDetailsStatisticsUnsubscriptionsAdminUnsubscription.php
index 99a7b857..73ffafed 100644
--- a/lib/Model/GetExtendedContactDetailsStatisticsUnsubscriptionsAdminUnsubscription.php
+++ b/lib/Model/GetExtendedContactDetailsStatisticsUnsubscriptionsAdminUnsubscription.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['eventTime'] = isset($data['eventTime']) ? $data['eventTime'] : null;
         $this->container['ip'] = isset($data['ip']) ? $data['ip'] : null;
@@ -334,5 +334,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedContactDetailsStatisticsUnsubscriptionsUserUnsubscription.php b/lib/Model/GetExtendedContactDetailsStatisticsUnsubscriptionsUserUnsubscription.php
index 6a9aaf97..2549374d 100644
--- a/lib/Model/GetExtendedContactDetailsStatisticsUnsubscriptionsUserUnsubscription.php
+++ b/lib/Model/GetExtendedContactDetailsStatisticsUnsubscriptionsUserUnsubscription.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['campaignId'] = isset($data['campaignId']) ? $data['campaignId'] : null;
         $this->container['eventTime'] = isset($data['eventTime']) ? $data['eventTime'] : null;
@@ -367,5 +367,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedList.php b/lib/Model/GetExtendedList.php
index 09f6804f..10393fce 100644
--- a/lib/Model/GetExtendedList.php
+++ b/lib/Model/GetExtendedList.php
@@ -182,7 +182,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         parent::__construct($data);
 
@@ -391,5 +391,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExtendedListCampaignStats.php b/lib/Model/GetExtendedListCampaignStats.php
index 468b5115..dde2308c 100644
--- a/lib/Model/GetExtendedListCampaignStats.php
+++ b/lib/Model/GetExtendedListCampaignStats.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['campaignId'] = isset($data['campaignId']) ? $data['campaignId'] : null;
         $this->container['stats'] = isset($data['stats']) ? $data['stats'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExternalFeedByUUID.php b/lib/Model/GetExternalFeedByUUID.php
index 685bda8b..613ef623 100644
--- a/lib/Model/GetExternalFeedByUUID.php
+++ b/lib/Model/GetExternalFeedByUUID.php
@@ -247,7 +247,7 @@ public function getAuthTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -708,5 +708,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetExternalFeedByUUIDHeaders.php b/lib/Model/GetExternalFeedByUUIDHeaders.php
index 29c89e1f..6b97dde4 100644
--- a/lib/Model/GetExternalFeedByUUIDHeaders.php
+++ b/lib/Model/GetExternalFeedByUUIDHeaders.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['value'] = isset($data['value']) ? $data['value'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetFolder.php b/lib/Model/GetFolder.php
index 24b2fd12..23e316e0 100644
--- a/lib/Model/GetFolder.php
+++ b/lib/Model/GetFolder.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -436,5 +436,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetFolderLists.php b/lib/Model/GetFolderLists.php
index 60b3c25d..eefae6e0 100644
--- a/lib/Model/GetFolderLists.php
+++ b/lib/Model/GetFolderLists.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['lists'] = isset($data['lists']) ? $data['lists'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetFolders.php b/lib/Model/GetFolders.php
index 1935c418..8f598b8e 100644
--- a/lib/Model/GetFolders.php
+++ b/lib/Model/GetFolders.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['folders'] = isset($data['folders']) ? $data['folders'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetInboundEmailEvents.php b/lib/Model/GetInboundEmailEvents.php
index c95405b1..a374c8e4 100644
--- a/lib/Model/GetInboundEmailEvents.php
+++ b/lib/Model/GetInboundEmailEvents.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['events'] = isset($data['events']) ? $data['events'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetInboundEmailEventsByUuid.php b/lib/Model/GetInboundEmailEventsByUuid.php
index 56077818..985c90bb 100644
--- a/lib/Model/GetInboundEmailEventsByUuid.php
+++ b/lib/Model/GetInboundEmailEventsByUuid.php
@@ -210,7 +210,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['receivedAt'] = isset($data['receivedAt']) ? $data['receivedAt'] : null;
         $this->container['deliveredAt'] = isset($data['deliveredAt']) ? $data['deliveredAt'] : null;
@@ -511,5 +511,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetInboundEmailEventsByUuidAttachments.php b/lib/Model/GetInboundEmailEventsByUuidAttachments.php
index ce25827d..ec7abb7a 100644
--- a/lib/Model/GetInboundEmailEventsByUuidAttachments.php
+++ b/lib/Model/GetInboundEmailEventsByUuidAttachments.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['contentType'] = isset($data['contentType']) ? $data['contentType'] : null;
@@ -391,5 +391,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetInboundEmailEventsByUuidLogs.php b/lib/Model/GetInboundEmailEventsByUuidLogs.php
index 3addbe48..1a82e5bd 100644
--- a/lib/Model/GetInboundEmailEventsByUuidLogs.php
+++ b/lib/Model/GetInboundEmailEventsByUuidLogs.php
@@ -199,7 +199,7 @@ public function getTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['date'] = isset($data['date']) ? $data['date'] : null;
         $this->container['type'] = isset($data['type']) ? $data['type'] : null;
@@ -367,5 +367,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetInboundEmailEventsEvents.php b/lib/Model/GetInboundEmailEventsEvents.php
index 966dc43d..31deb469 100644
--- a/lib/Model/GetInboundEmailEventsEvents.php
+++ b/lib/Model/GetInboundEmailEventsEvents.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['uuid'] = isset($data['uuid']) ? $data['uuid'] : null;
         $this->container['date'] = isset($data['date']) ? $data['date'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetInvitedUsersList.php b/lib/Model/GetInvitedUsersList.php
index 15e8982d..a0e46305 100644
--- a/lib/Model/GetInvitedUsersList.php
+++ b/lib/Model/GetInvitedUsersList.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['users'] = isset($data['users']) ? $data['users'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetInvitedUsersListFeatureAccess.php b/lib/Model/GetInvitedUsersListFeatureAccess.php
index 07ad614a..5abfb315 100644
--- a/lib/Model/GetInvitedUsersListFeatureAccess.php
+++ b/lib/Model/GetInvitedUsersListFeatureAccess.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['marketing'] = isset($data['marketing']) ? $data['marketing'] : null;
         $this->container['conversations'] = isset($data['conversations']) ? $data['conversations'] : null;
@@ -362,5 +362,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetInvitedUsersListUsers.php b/lib/Model/GetInvitedUsersListUsers.php
index 4978dd4e..63f5c52d 100644
--- a/lib/Model/GetInvitedUsersListUsers.php
+++ b/lib/Model/GetInvitedUsersListUsers.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['isOwner'] = isset($data['isOwner']) ? $data['isOwner'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetIp.php b/lib/Model/GetIp.php
index 322d6fcc..c782ed11 100644
--- a/lib/Model/GetIp.php
+++ b/lib/Model/GetIp.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['ip'] = isset($data['ip']) ? $data['ip'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetIpFromSender.php b/lib/Model/GetIpFromSender.php
index 4802c9ab..7fccfc7b 100644
--- a/lib/Model/GetIpFromSender.php
+++ b/lib/Model/GetIpFromSender.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['ip'] = isset($data['ip']) ? $data['ip'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetIps.php b/lib/Model/GetIps.php
index fbd6cd4c..7e944682 100644
--- a/lib/Model/GetIps.php
+++ b/lib/Model/GetIps.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['ips'] = isset($data['ips']) ? $data['ips'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetIpsFromSender.php b/lib/Model/GetIpsFromSender.php
index de5b6796..9d4b3001 100644
--- a/lib/Model/GetIpsFromSender.php
+++ b/lib/Model/GetIpsFromSender.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['ips'] = isset($data['ips']) ? $data['ips'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetList.php b/lib/Model/GetList.php
index e01ef485..25328740 100644
--- a/lib/Model/GetList.php
+++ b/lib/Model/GetList.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -436,5 +436,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetLists.php b/lib/Model/GetLists.php
index 57c93ee4..ece47049 100644
--- a/lib/Model/GetLists.php
+++ b/lib/Model/GetLists.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['lists'] = isset($data['lists']) ? $data['lists'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetOrders.php b/lib/Model/GetOrders.php
index cca4fc10..74a06a1d 100644
--- a/lib/Model/GetOrders.php
+++ b/lib/Model/GetOrders.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['orders'] = isset($data['orders']) ? $data['orders'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetProcess.php b/lib/Model/GetProcess.php
index 1bdea77d..05bf799e 100644
--- a/lib/Model/GetProcess.php
+++ b/lib/Model/GetProcess.php
@@ -207,7 +207,7 @@ public function getStatusAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['status'] = isset($data['status']) ? $data['status'] : null;
@@ -434,5 +434,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetProcesses.php b/lib/Model/GetProcesses.php
index c4ca6d5d..3861ad09 100644
--- a/lib/Model/GetProcesses.php
+++ b/lib/Model/GetProcesses.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['processes'] = isset($data['processes']) ? $data['processes'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetProductDetails.php b/lib/Model/GetProductDetails.php
index 328ac979..9d265b10 100644
--- a/lib/Model/GetProductDetails.php
+++ b/lib/Model/GetProductDetails.php
@@ -245,7 +245,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -739,5 +739,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetProducts.php b/lib/Model/GetProducts.php
index 3e432a0c..ef2568ea 100644
--- a/lib/Model/GetProducts.php
+++ b/lib/Model/GetProducts.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['products'] = isset($data['products']) ? $data['products'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetReports.php b/lib/Model/GetReports.php
index 07d8bf7b..32ad59e8 100644
--- a/lib/Model/GetReports.php
+++ b/lib/Model/GetReports.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['reports'] = isset($data['reports']) ? $data['reports'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetReportsReports.php b/lib/Model/GetReportsReports.php
index 49106d65..ad92bcea 100644
--- a/lib/Model/GetReportsReports.php
+++ b/lib/Model/GetReportsReports.php
@@ -235,7 +235,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['date'] = isset($data['date']) ? $data['date'] : null;
         $this->container['requests'] = isset($data['requests']) ? $data['requests'] : null;
@@ -700,5 +700,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetScheduledEmailByBatchId.php b/lib/Model/GetScheduledEmailByBatchId.php
index fc0ad3e5..b83fe6e7 100644
--- a/lib/Model/GetScheduledEmailByBatchId.php
+++ b/lib/Model/GetScheduledEmailByBatchId.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
         $this->container['batches'] = isset($data['batches']) ? $data['batches'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetScheduledEmailByBatchIdBatches.php b/lib/Model/GetScheduledEmailByBatchIdBatches.php
index 59bc5011..8fb5a9e8 100644
--- a/lib/Model/GetScheduledEmailByBatchIdBatches.php
+++ b/lib/Model/GetScheduledEmailByBatchIdBatches.php
@@ -204,7 +204,7 @@ public function getStatusAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['scheduledAt'] = isset($data['scheduledAt']) ? $data['scheduledAt'] : null;
         $this->container['createdAt'] = isset($data['createdAt']) ? $data['createdAt'] : null;
@@ -406,5 +406,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetScheduledEmailByMessageId.php b/lib/Model/GetScheduledEmailByMessageId.php
index 7064a41d..ae5b31ec 100644
--- a/lib/Model/GetScheduledEmailByMessageId.php
+++ b/lib/Model/GetScheduledEmailByMessageId.php
@@ -204,7 +204,7 @@ public function getStatusAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['scheduledAt'] = isset($data['scheduledAt']) ? $data['scheduledAt'] : null;
         $this->container['createdAt'] = isset($data['createdAt']) ? $data['createdAt'] : null;
@@ -406,5 +406,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSegments.php b/lib/Model/GetSegments.php
index 229e4354..6b8da9d3 100644
--- a/lib/Model/GetSegments.php
+++ b/lib/Model/GetSegments.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['segments'] = isset($data['segments']) ? $data['segments'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSegmentsSegments.php b/lib/Model/GetSegmentsSegments.php
index fed8fc01..08f0daa2 100644
--- a/lib/Model/GetSegmentsSegments.php
+++ b/lib/Model/GetSegmentsSegments.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['segmentName'] = isset($data['segmentName']) ? $data['segmentName'] : null;
@@ -391,5 +391,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSendersList.php b/lib/Model/GetSendersList.php
index 4651dc85..ae7b0d2f 100644
--- a/lib/Model/GetSendersList.php
+++ b/lib/Model/GetSendersList.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['senders'] = isset($data['senders']) ? $data['senders'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSendersListIps.php b/lib/Model/GetSendersListIps.php
index 8bfc1fb4..d54914e6 100644
--- a/lib/Model/GetSendersListIps.php
+++ b/lib/Model/GetSendersListIps.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['ip'] = isset($data['ip']) ? $data['ip'] : null;
         $this->container['domain'] = isset($data['domain']) ? $data['domain'] : null;
@@ -370,5 +370,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSendersListSenders.php b/lib/Model/GetSendersListSenders.php
index b621f865..f627c0ab 100644
--- a/lib/Model/GetSendersListSenders.php
+++ b/lib/Model/GetSendersListSenders.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -433,5 +433,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSharedTemplateUrl.php b/lib/Model/GetSharedTemplateUrl.php
index 62e3eb32..c713632d 100644
--- a/lib/Model/GetSharedTemplateUrl.php
+++ b/lib/Model/GetSharedTemplateUrl.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['sharedUrl'] = isset($data['sharedUrl']) ? $data['sharedUrl'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSmsCampaign.php b/lib/Model/GetSmsCampaign.php
index 4499ec63..7b702b11 100644
--- a/lib/Model/GetSmsCampaign.php
+++ b/lib/Model/GetSmsCampaign.php
@@ -243,7 +243,7 @@ public function getStatusAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -638,5 +638,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSmsCampaignOverview.php b/lib/Model/GetSmsCampaignOverview.php
index 739cde93..34e3dfba 100644
--- a/lib/Model/GetSmsCampaignOverview.php
+++ b/lib/Model/GetSmsCampaignOverview.php
@@ -233,7 +233,7 @@ public function getStatusAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -572,5 +572,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSmsCampaignRecipients.php b/lib/Model/GetSmsCampaignRecipients.php
index fecf2a6b..c059107d 100644
--- a/lib/Model/GetSmsCampaignRecipients.php
+++ b/lib/Model/GetSmsCampaignRecipients.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
     }
 
@@ -276,5 +276,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSmsCampaignStats.php b/lib/Model/GetSmsCampaignStats.php
index d6b528d2..af3fbde2 100644
--- a/lib/Model/GetSmsCampaignStats.php
+++ b/lib/Model/GetSmsCampaignStats.php
@@ -205,7 +205,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['delivered'] = isset($data['delivered']) ? $data['delivered'] : null;
         $this->container['sent'] = isset($data['sent']) ? $data['sent'] : null;
@@ -502,5 +502,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSmsCampaigns.php b/lib/Model/GetSmsCampaigns.php
index 09a711db..038f5a86 100644
--- a/lib/Model/GetSmsCampaigns.php
+++ b/lib/Model/GetSmsCampaigns.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['campaigns'] = isset($data['campaigns']) ? $data['campaigns'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSmsEventReport.php b/lib/Model/GetSmsEventReport.php
index 89833ec4..975b0e44 100644
--- a/lib/Model/GetSmsEventReport.php
+++ b/lib/Model/GetSmsEventReport.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['events'] = isset($data['events']) ? $data['events'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSmsEventReportEvents.php b/lib/Model/GetSmsEventReportEvents.php
index d10ee820..f9da8220 100644
--- a/lib/Model/GetSmsEventReportEvents.php
+++ b/lib/Model/GetSmsEventReportEvents.php
@@ -236,7 +236,7 @@ public function getEventAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['phoneNumber'] = isset($data['phoneNumber']) ? $data['phoneNumber'] : null;
         $this->container['date'] = isset($data['date']) ? $data['date'] : null;
@@ -529,5 +529,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSmtpTemplateOverview.php b/lib/Model/GetSmtpTemplateOverview.php
index 4a42b559..5c51a5c2 100644
--- a/lib/Model/GetSmtpTemplateOverview.php
+++ b/lib/Model/GetSmtpTemplateOverview.php
@@ -235,7 +235,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -697,5 +697,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSmtpTemplateOverviewSender.php b/lib/Model/GetSmtpTemplateOverviewSender.php
index c7538267..52624aac 100644
--- a/lib/Model/GetSmtpTemplateOverviewSender.php
+++ b/lib/Model/GetSmtpTemplateOverviewSender.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -361,5 +361,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSmtpTemplates.php b/lib/Model/GetSmtpTemplates.php
index fd481a44..6112ebfd 100644
--- a/lib/Model/GetSmtpTemplates.php
+++ b/lib/Model/GetSmtpTemplates.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
         $this->container['templates'] = isset($data['templates']) ? $data['templates'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetSsoToken.php b/lib/Model/GetSsoToken.php
index 37dd9698..861e80dc 100644
--- a/lib/Model/GetSsoToken.php
+++ b/lib/Model/GetSsoToken.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['token'] = isset($data['token']) ? $data['token'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetStatsByBrowser.php b/lib/Model/GetStatsByBrowser.php
index f999856e..5eb3dfbc 100644
--- a/lib/Model/GetStatsByBrowser.php
+++ b/lib/Model/GetStatsByBrowser.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
     }
 
@@ -276,5 +276,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetStatsByDevice.php b/lib/Model/GetStatsByDevice.php
index ab3d9b57..f30d0837 100644
--- a/lib/Model/GetStatsByDevice.php
+++ b/lib/Model/GetStatsByDevice.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['desktop'] = isset($data['desktop']) ? $data['desktop'] : null;
         $this->container['mobile'] = isset($data['mobile']) ? $data['mobile'] : null;
@@ -391,5 +391,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetStatsByDomain.php b/lib/Model/GetStatsByDomain.php
index fca7c01a..32f7e143 100644
--- a/lib/Model/GetStatsByDomain.php
+++ b/lib/Model/GetStatsByDomain.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
     }
 
@@ -276,5 +276,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetTransacAggregatedSmsReport.php b/lib/Model/GetTransacAggregatedSmsReport.php
index 97c0af03..b210c2c4 100644
--- a/lib/Model/GetTransacAggregatedSmsReport.php
+++ b/lib/Model/GetTransacAggregatedSmsReport.php
@@ -220,7 +220,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['range'] = isset($data['range']) ? $data['range'] : null;
         $this->container['requests'] = isset($data['requests']) ? $data['requests'] : null;
@@ -571,5 +571,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetTransacBlockedContacts.php b/lib/Model/GetTransacBlockedContacts.php
index 0481377a..729264a2 100644
--- a/lib/Model/GetTransacBlockedContacts.php
+++ b/lib/Model/GetTransacBlockedContacts.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
         $this->container['contacts'] = isset($data['contacts']) ? $data['contacts'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetTransacBlockedContactsContacts.php b/lib/Model/GetTransacBlockedContactsContacts.php
index d66e52a2..efe92f59 100644
--- a/lib/Model/GetTransacBlockedContactsContacts.php
+++ b/lib/Model/GetTransacBlockedContactsContacts.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['senderEmail'] = isset($data['senderEmail']) ? $data['senderEmail'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetTransacBlockedContactsReason.php b/lib/Model/GetTransacBlockedContactsReason.php
index ea513299..becb7a9c 100644
--- a/lib/Model/GetTransacBlockedContactsReason.php
+++ b/lib/Model/GetTransacBlockedContactsReason.php
@@ -204,7 +204,7 @@ public function getCodeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['code'] = isset($data['code']) ? $data['code'] : null;
         $this->container['message'] = isset($data['message']) ? $data['message'] : null;
@@ -372,5 +372,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetTransacEmailContent.php b/lib/Model/GetTransacEmailContent.php
index 75e23578..960d3115 100644
--- a/lib/Model/GetTransacEmailContent.php
+++ b/lib/Model/GetTransacEmailContent.php
@@ -205,7 +205,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['subject'] = isset($data['subject']) ? $data['subject'] : null;
@@ -499,5 +499,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetTransacEmailContentEvents.php b/lib/Model/GetTransacEmailContentEvents.php
index 138080e9..9f1b3e6c 100644
--- a/lib/Model/GetTransacEmailContentEvents.php
+++ b/lib/Model/GetTransacEmailContentEvents.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['time'] = isset($data['time']) ? $data['time'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetTransacSmsReport.php b/lib/Model/GetTransacSmsReport.php
index 9363b55a..6789cd3b 100644
--- a/lib/Model/GetTransacSmsReport.php
+++ b/lib/Model/GetTransacSmsReport.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['reports'] = isset($data['reports']) ? $data['reports'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetTransacSmsReportReports.php b/lib/Model/GetTransacSmsReportReports.php
index 87d2bddd..dc0ccde6 100644
--- a/lib/Model/GetTransacSmsReportReports.php
+++ b/lib/Model/GetTransacSmsReportReports.php
@@ -220,7 +220,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['date'] = isset($data['date']) ? $data['date'] : null;
         $this->container['requests'] = isset($data['requests']) ? $data['requests'] : null;
@@ -571,5 +571,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetUserPermission.php b/lib/Model/GetUserPermission.php
index 5ce95fd0..3c6669ee 100644
--- a/lib/Model/GetUserPermission.php
+++ b/lib/Model/GetUserPermission.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['status'] = isset($data['status']) ? $data['status'] : null;
@@ -371,5 +371,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetUserPermissionPrivileges.php b/lib/Model/GetUserPermissionPrivileges.php
index 03a5d171..dc558b30 100644
--- a/lib/Model/GetUserPermissionPrivileges.php
+++ b/lib/Model/GetUserPermissionPrivileges.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['feature'] = isset($data['feature']) ? $data['feature'] : null;
         $this->container['permissions'] = isset($data['permissions']) ? $data['permissions'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetWATemplates.php b/lib/Model/GetWATemplates.php
index 9d4eebdb..31bf7bcc 100644
--- a/lib/Model/GetWATemplates.php
+++ b/lib/Model/GetWATemplates.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['templates'] = isset($data['templates']) ? $data['templates'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetWATemplatesTemplates.php b/lib/Model/GetWATemplatesTemplates.php
index f1aef504..823ddd45 100644
--- a/lib/Model/GetWATemplatesTemplates.php
+++ b/lib/Model/GetWATemplatesTemplates.php
@@ -210,7 +210,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -532,5 +532,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetWebhook.php b/lib/Model/GetWebhook.php
index 0e4871d4..94b58668 100644
--- a/lib/Model/GetWebhook.php
+++ b/lib/Model/GetWebhook.php
@@ -235,7 +235,7 @@ public function getTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['url'] = isset($data['url']) ? $data['url'] : null;
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
@@ -624,5 +624,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetWebhookAuth.php b/lib/Model/GetWebhookAuth.php
index 234333d3..bf51190a 100644
--- a/lib/Model/GetWebhookAuth.php
+++ b/lib/Model/GetWebhookAuth.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['type'] = isset($data['type']) ? $data['type'] : null;
         $this->container['token'] = isset($data['token']) ? $data['token'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetWebhookHeaders.php b/lib/Model/GetWebhookHeaders.php
index aa1f6f08..75207d9c 100644
--- a/lib/Model/GetWebhookHeaders.php
+++ b/lib/Model/GetWebhookHeaders.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['key'] = isset($data['key']) ? $data['key'] : null;
         $this->container['value'] = isset($data['value']) ? $data['value'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetWebhooks.php b/lib/Model/GetWebhooks.php
index 6737fe2e..29bef12e 100644
--- a/lib/Model/GetWebhooks.php
+++ b/lib/Model/GetWebhooks.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['webhooks'] = isset($data['webhooks']) ? $data['webhooks'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetWhatsAppConfig.php b/lib/Model/GetWhatsAppConfig.php
index 37b17199..392e37df 100644
--- a/lib/Model/GetWhatsAppConfig.php
+++ b/lib/Model/GetWhatsAppConfig.php
@@ -234,7 +234,7 @@ public function getPhoneNumberNameStatusAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['whatsappBusinessAccountId'] = isset($data['whatsappBusinessAccountId']) ? $data['whatsappBusinessAccountId'] : null;
         $this->container['sendingLimit'] = isset($data['sendingLimit']) ? $data['sendingLimit'] : null;
@@ -519,5 +519,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetWhatsappCampaignOverview.php b/lib/Model/GetWhatsappCampaignOverview.php
index 6d534b49..79e64f19 100644
--- a/lib/Model/GetWhatsappCampaignOverview.php
+++ b/lib/Model/GetWhatsappCampaignOverview.php
@@ -242,7 +242,7 @@ public function getCampaignStatusAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['campaignName'] = isset($data['campaignName']) ? $data['campaignName'] : null;
@@ -606,5 +606,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetWhatsappCampaigns.php b/lib/Model/GetWhatsappCampaigns.php
index 25349867..6e33ce67 100644
--- a/lib/Model/GetWhatsappCampaigns.php
+++ b/lib/Model/GetWhatsappCampaigns.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['campaigns'] = isset($data['campaigns']) ? $data['campaigns'] : null;
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetWhatsappCampaignsCampaigns.php b/lib/Model/GetWhatsappCampaignsCampaigns.php
index 32d2ceb2..e62a7629 100644
--- a/lib/Model/GetWhatsappCampaignsCampaigns.php
+++ b/lib/Model/GetWhatsappCampaignsCampaigns.php
@@ -252,7 +252,7 @@ public function getCampaignStatusAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['campaignName'] = isset($data['campaignName']) ? $data['campaignName'] : null;
@@ -666,5 +666,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetWhatsappEventReport.php b/lib/Model/GetWhatsappEventReport.php
index 1ebd730f..502add42 100644
--- a/lib/Model/GetWhatsappEventReport.php
+++ b/lib/Model/GetWhatsappEventReport.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['events'] = isset($data['events']) ? $data['events'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/GetWhatsappEventReportEvents.php b/lib/Model/GetWhatsappEventReportEvents.php
index 8a45339e..d4ac1445 100644
--- a/lib/Model/GetWhatsappEventReportEvents.php
+++ b/lib/Model/GetWhatsappEventReportEvents.php
@@ -235,7 +235,7 @@ public function getEventAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['contactNumber'] = isset($data['contactNumber']) ? $data['contactNumber'] : null;
         $this->container['date'] = isset($data['date']) ? $data['date'] : null;
@@ -568,5 +568,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/InlineResponse200.php b/lib/Model/InlineResponse200.php
index 29347f65..e62c303c 100644
--- a/lib/Model/InlineResponse200.php
+++ b/lib/Model/InlineResponse200.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['groupName'] = isset($data['groupName']) ? $data['groupName'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/InlineResponse2001.php b/lib/Model/InlineResponse2001.php
index 4ffa18ce..95cd61a7 100644
--- a/lib/Model/InlineResponse2001.php
+++ b/lib/Model/InlineResponse2001.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
     }
@@ -305,5 +305,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/InlineResponse2002.php b/lib/Model/InlineResponse2002.php
index 52f600ef..473f936e 100644
--- a/lib/Model/InlineResponse2002.php
+++ b/lib/Model/InlineResponse2002.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -370,5 +370,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/InlineResponse201.php b/lib/Model/InlineResponse201.php
index 0c085bbb..7fbcd509 100644
--- a/lib/Model/InlineResponse201.php
+++ b/lib/Model/InlineResponse201.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/InlineResponse2011.php b/lib/Model/InlineResponse2011.php
index 78d2ddc6..27c9461f 100644
--- a/lib/Model/InlineResponse2011.php
+++ b/lib/Model/InlineResponse2011.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
     }
@@ -305,5 +305,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/InlineResponse2012.php b/lib/Model/InlineResponse2012.php
index 8cc8472f..a7901c3e 100644
--- a/lib/Model/InlineResponse2012.php
+++ b/lib/Model/InlineResponse2012.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
     }
@@ -305,5 +305,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/InlineResponse2013.php b/lib/Model/InlineResponse2013.php
index 4ee76570..95c9460b 100644
--- a/lib/Model/InlineResponse2013.php
+++ b/lib/Model/InlineResponse2013.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/InlineResponse2014.php b/lib/Model/InlineResponse2014.php
index d1cecdba..17f29c18 100644
--- a/lib/Model/InlineResponse2014.php
+++ b/lib/Model/InlineResponse2014.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['messageId'] = isset($data['messageId']) ? $data['messageId'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/InlineResponse2015.php b/lib/Model/InlineResponse2015.php
index 65f1c009..61253b0a 100644
--- a/lib/Model/InlineResponse2015.php
+++ b/lib/Model/InlineResponse2015.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/InviteAdminUser.php b/lib/Model/InviteAdminUser.php
index 75dbb6be..186395e5 100644
--- a/lib/Model/InviteAdminUser.php
+++ b/lib/Model/InviteAdminUser.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['allFeaturesAccess'] = isset($data['allFeaturesAccess']) ? $data['allFeaturesAccess'] : null;
@@ -400,5 +400,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/InviteAdminUserPrivileges.php b/lib/Model/InviteAdminUserPrivileges.php
index 32b2f8c2..f5bb6127 100644
--- a/lib/Model/InviteAdminUserPrivileges.php
+++ b/lib/Model/InviteAdminUserPrivileges.php
@@ -215,7 +215,7 @@ public function getPermissionsAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['feature'] = isset($data['feature']) ? $data['feature'] : null;
         $this->container['permissions'] = isset($data['permissions']) ? $data['permissions'] : null;
@@ -392,5 +392,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Inviteuser.php b/lib/Model/Inviteuser.php
index 88a888aa..c3d8c072 100644
--- a/lib/Model/Inviteuser.php
+++ b/lib/Model/Inviteuser.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['allFeaturesAccess'] = isset($data['allFeaturesAccess']) ? $data['allFeaturesAccess'] : null;
@@ -370,5 +370,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/InviteuserPrivileges.php b/lib/Model/InviteuserPrivileges.php
index 5832ae96..6178226b 100644
--- a/lib/Model/InviteuserPrivileges.php
+++ b/lib/Model/InviteuserPrivileges.php
@@ -287,7 +287,7 @@ public function getPermissionsAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['feature'] = isset($data['feature']) ? $data['feature'] : null;
         $this->container['permissions'] = isset($data['permissions']) ? $data['permissions'] : null;
@@ -464,5 +464,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/ManageIp.php b/lib/Model/ManageIp.php
index d3c973c4..120398d2 100644
--- a/lib/Model/ManageIp.php
+++ b/lib/Model/ManageIp.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['ip'] = isset($data['ip']) ? $data['ip'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/MasterDetailsResponse.php b/lib/Model/MasterDetailsResponse.php
index 3b982069..59f5c817 100644
--- a/lib/Model/MasterDetailsResponse.php
+++ b/lib/Model/MasterDetailsResponse.php
@@ -205,7 +205,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['companyName'] = isset($data['companyName']) ? $data['companyName'] : null;
@@ -481,5 +481,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/MasterDetailsResponseBillingInfo.php b/lib/Model/MasterDetailsResponseBillingInfo.php
index 519790b8..c783b3e5 100644
--- a/lib/Model/MasterDetailsResponseBillingInfo.php
+++ b/lib/Model/MasterDetailsResponseBillingInfo.php
@@ -191,7 +191,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['companyName'] = isset($data['companyName']) ? $data['companyName'] : null;
@@ -392,5 +392,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/MasterDetailsResponseBillingInfoAddress.php b/lib/Model/MasterDetailsResponseBillingInfoAddress.php
index 0fd11cf9..ffad813b 100644
--- a/lib/Model/MasterDetailsResponseBillingInfoAddress.php
+++ b/lib/Model/MasterDetailsResponseBillingInfoAddress.php
@@ -196,7 +196,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['streetAddress'] = isset($data['streetAddress']) ? $data['streetAddress'] : null;
         $this->container['locality'] = isset($data['locality']) ? $data['locality'] : null;
@@ -422,5 +422,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/MasterDetailsResponseBillingInfoName.php b/lib/Model/MasterDetailsResponseBillingInfoName.php
index 9eaebdf9..077734b2 100644
--- a/lib/Model/MasterDetailsResponseBillingInfoName.php
+++ b/lib/Model/MasterDetailsResponseBillingInfoName.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['givenName'] = isset($data['givenName']) ? $data['givenName'] : null;
         $this->container['familyName'] = isset($data['familyName']) ? $data['familyName'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/MasterDetailsResponsePlanInfo.php b/lib/Model/MasterDetailsResponsePlanInfo.php
index 366576ba..c44bb5b1 100644
--- a/lib/Model/MasterDetailsResponsePlanInfo.php
+++ b/lib/Model/MasterDetailsResponsePlanInfo.php
@@ -216,7 +216,7 @@ public function getPlanPeriodAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['currencyCode'] = isset($data['currencyCode']) ? $data['currencyCode'] : null;
         $this->container['nextBillingAt'] = isset($data['nextBillingAt']) ? $data['nextBillingAt'] : null;
@@ -484,5 +484,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/MasterDetailsResponsePlanInfoFeatures.php b/lib/Model/MasterDetailsResponsePlanInfoFeatures.php
index cb408111..dfddbae8 100644
--- a/lib/Model/MasterDetailsResponsePlanInfoFeatures.php
+++ b/lib/Model/MasterDetailsResponsePlanInfoFeatures.php
@@ -205,7 +205,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['unitValue'] = isset($data['unitValue']) ? $data['unitValue'] : null;
@@ -481,5 +481,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Note.php b/lib/Model/Note.php
index 8b73bc01..d6ac6cb8 100644
--- a/lib/Model/Note.php
+++ b/lib/Model/Note.php
@@ -206,7 +206,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['text'] = isset($data['text']) ? $data['text'] : null;
@@ -500,5 +500,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/NoteData.php b/lib/Model/NoteData.php
index 0b23fb09..04256b27 100644
--- a/lib/Model/NoteData.php
+++ b/lib/Model/NoteData.php
@@ -191,7 +191,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['text'] = isset($data['text']) ? $data['text'] : null;
         $this->container['contactIds'] = isset($data['contactIds']) ? $data['contactIds'] : null;
@@ -410,5 +410,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/NoteId.php b/lib/Model/NoteId.php
index 30d6181e..9df56892 100644
--- a/lib/Model/NoteId.php
+++ b/lib/Model/NoteId.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
     }
@@ -302,5 +302,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/NoteList.php b/lib/Model/NoteList.php
index 93e4cad6..2f3e3d07 100644
--- a/lib/Model/NoteList.php
+++ b/lib/Model/NoteList.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
     }
 
@@ -277,5 +277,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Order.php b/lib/Model/Order.php
index 688f576a..c2db6948 100644
--- a/lib/Model/Order.php
+++ b/lib/Model/Order.php
@@ -215,7 +215,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['createdAt'] = isset($data['createdAt']) ? $data['createdAt'] : null;
@@ -559,5 +559,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/OrderBatch.php b/lib/Model/OrderBatch.php
index 98a9fedb..d231dd43 100644
--- a/lib/Model/OrderBatch.php
+++ b/lib/Model/OrderBatch.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['orders'] = isset($data['orders']) ? $data['orders'] : null;
         $this->container['notifyUrl'] = isset($data['notifyUrl']) ? $data['notifyUrl'] : null;
@@ -364,5 +364,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/OrderBilling.php b/lib/Model/OrderBilling.php
index ded706ad..698a1ba7 100644
--- a/lib/Model/OrderBilling.php
+++ b/lib/Model/OrderBilling.php
@@ -206,7 +206,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['address'] = isset($data['address']) ? $data['address'] : null;
         $this->container['city'] = isset($data['city']) ? $data['city'] : null;
@@ -482,5 +482,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/OrderProducts.php b/lib/Model/OrderProducts.php
index 1a921c26..9f21e3fc 100644
--- a/lib/Model/OrderProducts.php
+++ b/lib/Model/OrderProducts.php
@@ -191,7 +191,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['productId'] = isset($data['productId']) ? $data['productId'] : null;
         $this->container['quantity'] = isset($data['quantity']) ? $data['quantity'] : null;
@@ -401,5 +401,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Otp.php b/lib/Model/Otp.php
index 89a28c0a..31714f01 100644
--- a/lib/Model/Otp.php
+++ b/lib/Model/Otp.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Pipeline.php b/lib/Model/Pipeline.php
index 02ab62c4..4f5df8c4 100644
--- a/lib/Model/Pipeline.php
+++ b/lib/Model/Pipeline.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['pipeline'] = isset($data['pipeline']) ? $data['pipeline'] : null;
         $this->container['pipelineName'] = isset($data['pipelineName']) ? $data['pipelineName'] : null;
@@ -362,5 +362,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/PipelineStage.php b/lib/Model/PipelineStage.php
index cf6d2f88..3e17a260 100644
--- a/lib/Model/PipelineStage.php
+++ b/lib/Model/PipelineStage.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Pipelines.php b/lib/Model/Pipelines.php
index c07200d0..49a221ee 100644
--- a/lib/Model/Pipelines.php
+++ b/lib/Model/Pipelines.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
     }
 
@@ -277,5 +277,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/PostContactInfo.php b/lib/Model/PostContactInfo.php
index 46d17d23..f582c52b 100644
--- a/lib/Model/PostContactInfo.php
+++ b/lib/Model/PostContactInfo.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['contacts'] = isset($data['contacts']) ? $data['contacts'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/PostContactInfoContacts.php b/lib/Model/PostContactInfoContacts.php
index 978c032f..92122e3d 100644
--- a/lib/Model/PostContactInfoContacts.php
+++ b/lib/Model/PostContactInfoContacts.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['success'] = isset($data['success']) ? $data['success'] : null;
         $this->container['failure'] = isset($data['failure']) ? $data['failure'] : null;
@@ -391,5 +391,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/PostSendFailed.php b/lib/Model/PostSendFailed.php
index 8c7567d5..6f35d573 100644
--- a/lib/Model/PostSendFailed.php
+++ b/lib/Model/PostSendFailed.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['code'] = isset($data['code']) ? $data['code'] : null;
         $this->container['message'] = isset($data['message']) ? $data['message'] : null;
@@ -427,5 +427,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/PostSendSmsTestFailed.php b/lib/Model/PostSendSmsTestFailed.php
index a74ea9dd..cf09a80e 100644
--- a/lib/Model/PostSendSmsTestFailed.php
+++ b/lib/Model/PostSendSmsTestFailed.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['code'] = isset($data['code']) ? $data['code'] : null;
         $this->container['message'] = isset($data['message']) ? $data['message'] : null;
@@ -397,5 +397,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/PutRevokeUserPermission.php b/lib/Model/PutRevokeUserPermission.php
index b527afd0..8a7a2ad8 100644
--- a/lib/Model/PutRevokeUserPermission.php
+++ b/lib/Model/PutRevokeUserPermission.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
     }
@@ -305,5 +305,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Putresendcancelinvitation.php b/lib/Model/Putresendcancelinvitation.php
index ba77e8bb..0c354da4 100644
--- a/lib/Model/Putresendcancelinvitation.php
+++ b/lib/Model/Putresendcancelinvitation.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
     }
@@ -305,5 +305,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/RemainingCreditModel.php b/lib/Model/RemainingCreditModel.php
index 2502d8c3..7f9db718 100644
--- a/lib/Model/RemainingCreditModel.php
+++ b/lib/Model/RemainingCreditModel.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['child'] = isset($data['child']) ? $data['child'] : null;
         $this->container['reseller'] = isset($data['reseller']) ? $data['reseller'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/RemainingCreditModelChild.php b/lib/Model/RemainingCreditModelChild.php
index 98b9769d..e4ee27b7 100644
--- a/lib/Model/RemainingCreditModelChild.php
+++ b/lib/Model/RemainingCreditModelChild.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['sms'] = isset($data['sms']) ? $data['sms'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -338,5 +338,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/RemainingCreditModelReseller.php b/lib/Model/RemainingCreditModelReseller.php
index 288b7083..8ea66647 100644
--- a/lib/Model/RemainingCreditModelReseller.php
+++ b/lib/Model/RemainingCreditModelReseller.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['sms'] = isset($data['sms']) ? $data['sms'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/RemoveContactFromList.php b/lib/Model/RemoveContactFromList.php
index b253f365..46a7b0a4 100644
--- a/lib/Model/RemoveContactFromList.php
+++ b/lib/Model/RemoveContactFromList.php
@@ -187,7 +187,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['emails'] = isset($data['emails']) ? $data['emails'] : null;
         $this->container['ids'] = isset($data['ids']) ? $data['ids'] : null;
diff --git a/lib/Model/RemoveCredits.php b/lib/Model/RemoveCredits.php
index a214ae6d..535539cf 100644
--- a/lib/Model/RemoveCredits.php
+++ b/lib/Model/RemoveCredits.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['sms'] = isset($data['sms']) ? $data['sms'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/RequestContactExport.php b/lib/Model/RequestContactExport.php
index 3fb1bd20..bff1ff4e 100644
--- a/lib/Model/RequestContactExport.php
+++ b/lib/Model/RequestContactExport.php
@@ -202,7 +202,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['exportAttributes'] = isset($data['exportAttributes']) ? $data['exportAttributes'] : null;
         $this->container['customContactFilter'] = isset($data['customContactFilter']) ? $data['customContactFilter'] : null;
diff --git a/lib/Model/RequestContactExportCustomContactFilter.php b/lib/Model/RequestContactExportCustomContactFilter.php
index baf63ba8..42147d40 100644
--- a/lib/Model/RequestContactExportCustomContactFilter.php
+++ b/lib/Model/RequestContactExportCustomContactFilter.php
@@ -262,7 +262,7 @@ public function getActionForSmsCampaignsAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['actionForContacts'] = isset($data['actionForContacts']) ? $data['actionForContacts'] : null;
         $this->container['actionForEmailCampaigns'] = isset($data['actionForEmailCampaigns']) ? $data['actionForEmailCampaigns'] : null;
@@ -564,5 +564,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/RequestContactImport.php b/lib/Model/RequestContactImport.php
index 5c45bbef..2dd2ce7e 100644
--- a/lib/Model/RequestContactImport.php
+++ b/lib/Model/RequestContactImport.php
@@ -222,7 +222,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['fileUrl'] = isset($data['fileUrl']) ? $data['fileUrl'] : null;
         $this->container['fileBody'] = isset($data['fileBody']) ? $data['fileBody'] : null;
diff --git a/lib/Model/RequestContactImportJsonBody.php b/lib/Model/RequestContactImportJsonBody.php
index dca681ab..8d954b34 100644
--- a/lib/Model/RequestContactImportJsonBody.php
+++ b/lib/Model/RequestContactImportJsonBody.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['attributes'] = isset($data['attributes']) ? $data['attributes'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/RequestContactImportNewList.php b/lib/Model/RequestContactImportNewList.php
index 9b1ffe72..a20382ef 100644
--- a/lib/Model/RequestContactImportNewList.php
+++ b/lib/Model/RequestContactImportNewList.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['listName'] = isset($data['listName']) ? $data['listName'] : null;
         $this->container['folderId'] = isset($data['folderId']) ? $data['folderId'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/RequestSmsRecipientExport.php b/lib/Model/RequestSmsRecipientExport.php
index c9a592ce..bc1fecbc 100644
--- a/lib/Model/RequestSmsRecipientExport.php
+++ b/lib/Model/RequestSmsRecipientExport.php
@@ -203,7 +203,7 @@ public function getRecipientsTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['notifyURL'] = isset($data['notifyURL']) ? $data['notifyURL'] : null;
         $this->container['recipientsType'] = isset($data['recipientsType']) ? $data['recipientsType'] : null;
@@ -374,5 +374,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/ScheduleSmtpEmail.php b/lib/Model/ScheduleSmtpEmail.php
index e0f077cd..80f26e42 100644
--- a/lib/Model/ScheduleSmtpEmail.php
+++ b/lib/Model/ScheduleSmtpEmail.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['messageId'] = isset($data['messageId']) ? $data['messageId'] : null;
         $this->container['messageIds'] = isset($data['messageIds']) ? $data['messageIds'] : null;
@@ -361,5 +361,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SendReport.php b/lib/Model/SendReport.php
index 84b0c606..566ef229 100644
--- a/lib/Model/SendReport.php
+++ b/lib/Model/SendReport.php
@@ -203,7 +203,7 @@ public function getLanguageAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['language'] = isset($data['language']) ? $data['language'] : 'fr';
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -374,5 +374,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SendReportEmail.php b/lib/Model/SendReportEmail.php
index a5aa0681..56cad934 100644
--- a/lib/Model/SendReportEmail.php
+++ b/lib/Model/SendReportEmail.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['to'] = isset($data['to']) ? $data['to'] : null;
         $this->container['body'] = isset($data['body']) ? $data['body'] : null;
@@ -338,5 +338,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SendSms.php b/lib/Model/SendSms.php
index 3d332aae..74768135 100644
--- a/lib/Model/SendSms.php
+++ b/lib/Model/SendSms.php
@@ -192,7 +192,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['reference'] = isset($data['reference']) ? $data['reference'] : null;
         $this->container['messageId'] = isset($data['messageId']) ? $data['messageId'] : null;
diff --git a/lib/Model/SendTestSms.php b/lib/Model/SendTestSms.php
index 7421b389..8fe37505 100644
--- a/lib/Model/SendTestSms.php
+++ b/lib/Model/SendTestSms.php
@@ -172,7 +172,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['phoneNumber'] = isset($data['phoneNumber']) ? $data['phoneNumber'] : null;
     }
diff --git a/lib/Model/SendTransacSms.php b/lib/Model/SendTransacSms.php
index bb848a85..98d1d07e 100644
--- a/lib/Model/SendTransacSms.php
+++ b/lib/Model/SendTransacSms.php
@@ -221,7 +221,7 @@ public function getTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['sender'] = isset($data['sender']) ? $data['sender'] : null;
         $this->container['recipient'] = isset($data['recipient']) ? $data['recipient'] : null;
diff --git a/lib/Model/SendTransacSmsTag.php b/lib/Model/SendTransacSmsTag.php
index 9503bb2f..9c387d07 100644
--- a/lib/Model/SendTransacSmsTag.php
+++ b/lib/Model/SendTransacSmsTag.php
@@ -173,7 +173,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['field'] = isset($data['field']) ? $data['field'] : null;
     }
diff --git a/lib/Model/SendWhatsappMessage.php b/lib/Model/SendWhatsappMessage.php
index ecb3ce45..89d79dfb 100644
--- a/lib/Model/SendWhatsappMessage.php
+++ b/lib/Model/SendWhatsappMessage.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['templateId'] = isset($data['templateId']) ? $data['templateId'] : null;
         $this->container['text'] = isset($data['text']) ? $data['text'] : null;
@@ -427,5 +427,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SsoTokenRequest.php b/lib/Model/SsoTokenRequest.php
index b29cedc8..5cb098bb 100644
--- a/lib/Model/SsoTokenRequest.php
+++ b/lib/Model/SsoTokenRequest.php
@@ -217,7 +217,7 @@ public function getTargetAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -438,5 +438,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountAppsToggleRequest.php b/lib/Model/SubAccountAppsToggleRequest.php
index f7b9392b..0e54e530 100644
--- a/lib/Model/SubAccountAppsToggleRequest.php
+++ b/lib/Model/SubAccountAppsToggleRequest.php
@@ -236,7 +236,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['inbox'] = isset($data['inbox']) ? $data['inbox'] : null;
         $this->container['whatsapp'] = isset($data['whatsapp']) ? $data['whatsapp'] : null;
@@ -662,5 +662,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountDetailsResponse.php b/lib/Model/SubAccountDetailsResponse.php
index 0c1decaa..24a7b423 100644
--- a/lib/Model/SubAccountDetailsResponse.php
+++ b/lib/Model/SubAccountDetailsResponse.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -391,5 +391,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountDetailsResponsePlanInfo.php b/lib/Model/SubAccountDetailsResponsePlanInfo.php
index 5283b787..876b94ee 100644
--- a/lib/Model/SubAccountDetailsResponsePlanInfo.php
+++ b/lib/Model/SubAccountDetailsResponsePlanInfo.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['credits'] = isset($data['credits']) ? $data['credits'] : null;
         $this->container['features'] = isset($data['features']) ? $data['features'] : null;
@@ -362,5 +362,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountDetailsResponsePlanInfoCredits.php b/lib/Model/SubAccountDetailsResponsePlanInfoCredits.php
index 425dace7..533fc437 100644
--- a/lib/Model/SubAccountDetailsResponsePlanInfoCredits.php
+++ b/lib/Model/SubAccountDetailsResponsePlanInfoCredits.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['sms'] = isset($data['sms']) ? $data['sms'] : null;
         $this->container['emails'] = isset($data['emails']) ? $data['emails'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountDetailsResponsePlanInfoCreditsEmails.php b/lib/Model/SubAccountDetailsResponsePlanInfoCreditsEmails.php
index dd1b5827..ad853c69 100644
--- a/lib/Model/SubAccountDetailsResponsePlanInfoCreditsEmails.php
+++ b/lib/Model/SubAccountDetailsResponsePlanInfoCreditsEmails.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['quantity'] = isset($data['quantity']) ? $data['quantity'] : null;
         $this->container['remaining'] = isset($data['remaining']) ? $data['remaining'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountDetailsResponsePlanInfoFeatures.php b/lib/Model/SubAccountDetailsResponsePlanInfoFeatures.php
index b79a45f4..cd08128f 100644
--- a/lib/Model/SubAccountDetailsResponsePlanInfoFeatures.php
+++ b/lib/Model/SubAccountDetailsResponsePlanInfoFeatures.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['inbox'] = isset($data['inbox']) ? $data['inbox'] : null;
         $this->container['landingPage'] = isset($data['landingPage']) ? $data['landingPage'] : null;
@@ -362,5 +362,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountDetailsResponsePlanInfoFeaturesInbox.php b/lib/Model/SubAccountDetailsResponsePlanInfoFeaturesInbox.php
index 76e2f65d..d97ce378 100644
--- a/lib/Model/SubAccountDetailsResponsePlanInfoFeaturesInbox.php
+++ b/lib/Model/SubAccountDetailsResponsePlanInfoFeaturesInbox.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['quantity'] = isset($data['quantity']) ? $data['quantity'] : null;
         $this->container['remaining'] = isset($data['remaining']) ? $data['remaining'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountDetailsResponsePlanInfoFeaturesLandingPage.php b/lib/Model/SubAccountDetailsResponsePlanInfoFeaturesLandingPage.php
index 3bce42df..41042a41 100644
--- a/lib/Model/SubAccountDetailsResponsePlanInfoFeaturesLandingPage.php
+++ b/lib/Model/SubAccountDetailsResponsePlanInfoFeaturesLandingPage.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['quantity'] = isset($data['quantity']) ? $data['quantity'] : null;
         $this->container['remaining'] = isset($data['remaining']) ? $data['remaining'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountDetailsResponsePlanInfoFeaturesUsers.php b/lib/Model/SubAccountDetailsResponsePlanInfoFeaturesUsers.php
index 37007963..ea247211 100644
--- a/lib/Model/SubAccountDetailsResponsePlanInfoFeaturesUsers.php
+++ b/lib/Model/SubAccountDetailsResponsePlanInfoFeaturesUsers.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['quantity'] = isset($data['quantity']) ? $data['quantity'] : null;
         $this->container['remaining'] = isset($data['remaining']) ? $data['remaining'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountUpdatePlanRequest.php b/lib/Model/SubAccountUpdatePlanRequest.php
index 385a1f08..1da62934 100644
--- a/lib/Model/SubAccountUpdatePlanRequest.php
+++ b/lib/Model/SubAccountUpdatePlanRequest.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['credits'] = isset($data['credits']) ? $data['credits'] : null;
         $this->container['features'] = isset($data['features']) ? $data['features'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountUpdatePlanRequestCredits.php b/lib/Model/SubAccountUpdatePlanRequestCredits.php
index c116f682..9bdee9ea 100644
--- a/lib/Model/SubAccountUpdatePlanRequestCredits.php
+++ b/lib/Model/SubAccountUpdatePlanRequestCredits.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
     }
@@ -302,5 +302,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountUpdatePlanRequestFeatures.php b/lib/Model/SubAccountUpdatePlanRequestFeatures.php
index d0d20fb0..35166f19 100644
--- a/lib/Model/SubAccountUpdatePlanRequestFeatures.php
+++ b/lib/Model/SubAccountUpdatePlanRequestFeatures.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['users'] = isset($data['users']) ? $data['users'] : null;
         $this->container['landingPage'] = isset($data['landingPage']) ? $data['landingPage'] : null;
@@ -362,5 +362,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountsResponse.php b/lib/Model/SubAccountsResponse.php
index 6f6e0884..173a9c64 100644
--- a/lib/Model/SubAccountsResponse.php
+++ b/lib/Model/SubAccountsResponse.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['count'] = isset($data['count']) ? $data['count'] : null;
         $this->container['subAccounts'] = isset($data['subAccounts']) ? $data['subAccounts'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/SubAccountsResponseSubAccounts.php b/lib/Model/SubAccountsResponseSubAccounts.php
index 1641dfa2..e0777e5b 100644
--- a/lib/Model/SubAccountsResponseSubAccounts.php
+++ b/lib/Model/SubAccountsResponseSubAccounts.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['companyName'] = isset($data['companyName']) ? $data['companyName'] : null;
@@ -403,5 +403,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/Task.php b/lib/Model/Task.php
index 08d27b3f..065fea9f 100644
--- a/lib/Model/Task.php
+++ b/lib/Model/Task.php
@@ -201,7 +201,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['taskTypeId'] = isset($data['taskTypeId']) ? $data['taskTypeId'] : null;
@@ -458,5 +458,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/TaskList.php b/lib/Model/TaskList.php
index 51115b65..34685f44 100644
--- a/lib/Model/TaskList.php
+++ b/lib/Model/TaskList.php
@@ -176,7 +176,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['items'] = isset($data['items']) ? $data['items'] : null;
     }
@@ -302,5 +302,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/TaskReminder.php b/lib/Model/TaskReminder.php
index fb84ad02..3552b017 100644
--- a/lib/Model/TaskReminder.php
+++ b/lib/Model/TaskReminder.php
@@ -205,7 +205,7 @@ public function getUnitAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['value'] = isset($data['value']) ? $data['value'] : null;
         $this->container['unit'] = isset($data['unit']) ? $data['unit'] : null;
@@ -407,5 +407,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/TaskTypes.php b/lib/Model/TaskTypes.php
index 305351e4..f6bd32c7 100644
--- a/lib/Model/TaskTypes.php
+++ b/lib/Model/TaskTypes.php
@@ -181,7 +181,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
         $this->container['title'] = isset($data['title']) ? $data['title'] : null;
@@ -332,5 +332,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateAttribute.php b/lib/Model/UpdateAttribute.php
index 010877e4..b2f1569d 100644
--- a/lib/Model/UpdateAttribute.php
+++ b/lib/Model/UpdateAttribute.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['value'] = isset($data['value']) ? $data['value'] : null;
         $this->container['enumeration'] = isset($data['enumeration']) ? $data['enumeration'] : null;
@@ -361,5 +361,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateAttributeEnumeration.php b/lib/Model/UpdateAttributeEnumeration.php
index 81d9b668..d14f29f1 100644
--- a/lib/Model/UpdateAttributeEnumeration.php
+++ b/lib/Model/UpdateAttributeEnumeration.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['value'] = isset($data['value']) ? $data['value'] : null;
         $this->container['label'] = isset($data['label']) ? $data['label'] : null;
@@ -337,5 +337,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateBatchContacts.php b/lib/Model/UpdateBatchContacts.php
index f922dd7c..bd705b24 100644
--- a/lib/Model/UpdateBatchContacts.php
+++ b/lib/Model/UpdateBatchContacts.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['contacts'] = isset($data['contacts']) ? $data['contacts'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateBatchContactsContacts.php b/lib/Model/UpdateBatchContactsContacts.php
index 5de1c5c7..32d6e2c8 100644
--- a/lib/Model/UpdateBatchContactsContacts.php
+++ b/lib/Model/UpdateBatchContactsContacts.php
@@ -220,7 +220,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['id'] = isset($data['id']) ? $data['id'] : null;
@@ -571,5 +571,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateBatchContactsModel.php b/lib/Model/UpdateBatchContactsModel.php
index afe0a6d7..c4492833 100644
--- a/lib/Model/UpdateBatchContactsModel.php
+++ b/lib/Model/UpdateBatchContactsModel.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['successIds'] = isset($data['successIds']) ? $data['successIds'] : null;
         $this->container['failureIds'] = isset($data['failureIds']) ? $data['failureIds'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateCampaignStatus.php b/lib/Model/UpdateCampaignStatus.php
index 98aa9027..a67fe621 100644
--- a/lib/Model/UpdateCampaignStatus.php
+++ b/lib/Model/UpdateCampaignStatus.php
@@ -203,7 +203,7 @@ public function getStatusAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['status'] = isset($data['status']) ? $data['status'] : null;
     }
@@ -346,5 +346,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateChild.php b/lib/Model/UpdateChild.php
index ddcb0d23..b2fe0d49 100644
--- a/lib/Model/UpdateChild.php
+++ b/lib/Model/UpdateChild.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
         $this->container['firstName'] = isset($data['firstName']) ? $data['firstName'] : null;
@@ -421,5 +421,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateChildAccountStatus.php b/lib/Model/UpdateChildAccountStatus.php
index 6fc4ce21..5097dc07 100644
--- a/lib/Model/UpdateChildAccountStatus.php
+++ b/lib/Model/UpdateChildAccountStatus.php
@@ -190,7 +190,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['transactionalEmail'] = isset($data['transactionalEmail']) ? $data['transactionalEmail'] : null;
         $this->container['transactionalSms'] = isset($data['transactionalSms']) ? $data['transactionalSms'] : null;
@@ -391,5 +391,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateChildDomain.php b/lib/Model/UpdateChildDomain.php
index db4d98b0..847eb1ab 100644
--- a/lib/Model/UpdateChildDomain.php
+++ b/lib/Model/UpdateChildDomain.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['domain'] = isset($data['domain']) ? $data['domain'] : null;
     }
@@ -301,5 +301,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateContact.php b/lib/Model/UpdateContact.php
index 9431618b..543d074c 100644
--- a/lib/Model/UpdateContact.php
+++ b/lib/Model/UpdateContact.php
@@ -202,7 +202,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['attributes'] = isset($data['attributes']) ? $data['attributes'] : null;
         $this->container['extId'] = isset($data['extId']) ? $data['extId'] : null;
diff --git a/lib/Model/UpdateCouponCollection.php b/lib/Model/UpdateCouponCollection.php
index fe6b87ca..660c19ab 100644
--- a/lib/Model/UpdateCouponCollection.php
+++ b/lib/Model/UpdateCouponCollection.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['defaultCoupon'] = isset($data['defaultCoupon']) ? $data['defaultCoupon'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateEmailCampaign.php b/lib/Model/UpdateEmailCampaign.php
index 0fc74b84..e959f91f 100644
--- a/lib/Model/UpdateEmailCampaign.php
+++ b/lib/Model/UpdateEmailCampaign.php
@@ -340,7 +340,7 @@ public function getWinnerCriteriaAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['tag'] = isset($data['tag']) ? $data['tag'] : null;
         $this->container['sender'] = isset($data['sender']) ? $data['sender'] : null;
@@ -1281,5 +1281,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateEmailCampaignRecipients.php b/lib/Model/UpdateEmailCampaignRecipients.php
index 11e1e8a9..66be65f9 100644
--- a/lib/Model/UpdateEmailCampaignRecipients.php
+++ b/lib/Model/UpdateEmailCampaignRecipients.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['exclusionListIds'] = isset($data['exclusionListIds']) ? $data['exclusionListIds'] : null;
         $this->container['listIds'] = isset($data['listIds']) ? $data['listIds'] : null;
@@ -362,5 +362,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateEmailCampaignSender.php b/lib/Model/UpdateEmailCampaignSender.php
index a0e3f2dc..051e0503 100644
--- a/lib/Model/UpdateEmailCampaignSender.php
+++ b/lib/Model/UpdateEmailCampaignSender.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -362,5 +362,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateExternalFeed.php b/lib/Model/UpdateExternalFeed.php
index f6034cc7..45b1a673 100644
--- a/lib/Model/UpdateExternalFeed.php
+++ b/lib/Model/UpdateExternalFeed.php
@@ -232,7 +232,7 @@ public function getAuthTypeAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['url'] = isset($data['url']) ? $data['url'] : null;
@@ -591,5 +591,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateList.php b/lib/Model/UpdateList.php
index 076cbe5a..21a1e7b6 100644
--- a/lib/Model/UpdateList.php
+++ b/lib/Model/UpdateList.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['folderId'] = isset($data['folderId']) ? $data['folderId'] : null;
@@ -331,5 +331,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateSender.php b/lib/Model/UpdateSender.php
index 7f5548aa..697fee45 100644
--- a/lib/Model/UpdateSender.php
+++ b/lib/Model/UpdateSender.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -361,5 +361,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateSmsCampaign.php b/lib/Model/UpdateSmsCampaign.php
index b7eea8ab..70f5e95e 100644
--- a/lib/Model/UpdateSmsCampaign.php
+++ b/lib/Model/UpdateSmsCampaign.php
@@ -210,7 +210,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['sender'] = isset($data['sender']) ? $data['sender'] : null;
@@ -519,5 +519,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateSmtpTemplate.php b/lib/Model/UpdateSmtpTemplate.php
index a9d6dba3..05665248 100644
--- a/lib/Model/UpdateSmtpTemplate.php
+++ b/lib/Model/UpdateSmtpTemplate.php
@@ -220,7 +220,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['tag'] = isset($data['tag']) ? $data['tag'] : null;
         $this->container['sender'] = isset($data['sender']) ? $data['sender'] : null;
@@ -571,5 +571,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateSmtpTemplateSender.php b/lib/Model/UpdateSmtpTemplateSender.php
index 6997349c..36e566e4 100644
--- a/lib/Model/UpdateSmtpTemplateSender.php
+++ b/lib/Model/UpdateSmtpTemplateSender.php
@@ -186,7 +186,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['email'] = isset($data['email']) ? $data['email'] : null;
@@ -362,5 +362,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateWebhook.php b/lib/Model/UpdateWebhook.php
index 6b8d0161..cf5a5eaa 100644
--- a/lib/Model/UpdateWebhook.php
+++ b/lib/Model/UpdateWebhook.php
@@ -250,7 +250,7 @@ public function getEventsAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['url'] = isset($data['url']) ? $data['url'] : null;
         $this->container['description'] = isset($data['description']) ? $data['description'] : null;
@@ -535,5 +535,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UpdateWhatsAppCampaign.php b/lib/Model/UpdateWhatsAppCampaign.php
index 20a48797..de211e00 100644
--- a/lib/Model/UpdateWhatsAppCampaign.php
+++ b/lib/Model/UpdateWhatsAppCampaign.php
@@ -205,7 +205,7 @@ public function getCampaignStatusAllowableValues()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['campaignName'] = isset($data['campaignName']) ? $data['campaignName'] : null;
         $this->container['campaignStatus'] = isset($data['campaignStatus']) ? $data['campaignStatus'] : 'scheduled';
@@ -423,5 +423,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UploadImageModel.php b/lib/Model/UploadImageModel.php
index 7285b8f3..75036a22 100644
--- a/lib/Model/UploadImageModel.php
+++ b/lib/Model/UploadImageModel.php
@@ -175,7 +175,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['url'] = isset($data['url']) ? $data['url'] : null;
     }
@@ -304,5 +304,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/UploadImageToGallery.php b/lib/Model/UploadImageToGallery.php
index 7510add0..8534a678 100644
--- a/lib/Model/UploadImageToGallery.php
+++ b/lib/Model/UploadImageToGallery.php
@@ -180,7 +180,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['imageUrl'] = isset($data['imageUrl']) ? $data['imageUrl'] : null;
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
@@ -334,5 +334,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/VariablesItems.php b/lib/Model/VariablesItems.php
index e6c68647..0fc38ca8 100644
--- a/lib/Model/VariablesItems.php
+++ b/lib/Model/VariablesItems.php
@@ -185,7 +185,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['default'] = isset($data['default']) ? $data['default'] : null;
@@ -361,5 +361,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/WhatsappCampStats.php b/lib/Model/WhatsappCampStats.php
index 8aacad6e..568330ff 100644
--- a/lib/Model/WhatsappCampStats.php
+++ b/lib/Model/WhatsappCampStats.php
@@ -195,7 +195,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['sent'] = isset($data['sent']) ? $data['sent'] : null;
         $this->container['delivered'] = isset($data['delivered']) ? $data['delivered'] : null;
@@ -436,5 +436,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-
diff --git a/lib/Model/WhatsappCampTemplate.php b/lib/Model/WhatsappCampTemplate.php
index 21e10057..7a6c6158 100644
--- a/lib/Model/WhatsappCampTemplate.php
+++ b/lib/Model/WhatsappCampTemplate.php
@@ -225,7 +225,7 @@ public function getModelName()
      * @param mixed[] $data Associated array of property values
      *                      initializing the model
      */
-    public function __construct(array $data = null)
+    public function __construct(?array $data = null)
     {
         $this->container['name'] = isset($data['name']) ? $data['name'] : null;
         $this->container['category'] = isset($data['category']) ? $data['category'] : null;
@@ -601,5 +601,3 @@ public function __toString()
         return json_encode(ObjectSerializer::sanitizeForSerialization($this));
     }
 }
-
-