how to write in a certain uid of user

[vaibhavkumar049]

I am trying to implement a chatbot using dialogflow and flutter. I need to save some data from the user at different points and also return this data to the user. In this process, user's uid will play an important role as I am trying to save data from user using doc id as user's uid. So my problem is how to get user uid in dialogflow fulfillment

[Ludwigvsch]

Could you already solve this issue?