Add error handling to expose server response during failed auth (#111)

Updates the error messaging to include the server response during failed authentication.

Author: sandymcfadden

RELEASE-NOTES.txt

@@ -1,5 +1,9 @@
 # Changelog
 
+## 1.1.2
+
+- Updates the error messaging to include the server response during failed authentication [#111](https://github.com/simperium/node-simperium/pull/111)
+
 ## 1.1.0 - 1.1.1
 
  - Increase usability in other projects by separating `node` and browser modules [#100](https://github.com/Simperium/node-simperium/pull/100)

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "simperium",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "description": "A simperium client for node.js",
   "main": "./lib/simperium/index.js",
   "browser": {

package.json

@@ -8,11 +8,16 @@ type User = {
 	access_token: string,
 };
 
-const fromJSON = ( json: string ): User => {
-	const data = JSON.parse( json );
-	if ( ! data.access_token && typeof data.access_token !== 'string' ) {
-		throw new Error( 'access_token not present' );
-	}
+const fromJSON = (json: string): User => {
+  let data;
+  try {
+    data = JSON.parse(json);
+  } catch (error) {
+    throw new Error(json);
+  }
+  if (!data.access_token && typeof data.access_token !== 'string') {
+    throw new Error('access_token not present');
+  }
 	return {
 		options: data,
 		access_token: new String( data.access_token ).toString()