Got it @Marllon_Mainardes.
Thanks for explaining this in detail. I do believe that this will need some dev effort from Freshchat.
Atleast allowing the user_id to be populated in the conversation details.
Although the ideal approach is to natively(Freshchat feature) first create the user, start the conversation on Freshchat first before passing the data to Whatsapp API. Then on reply, retrieve user via search natively to append it to the chat but this is something we don’t have yet.
I will try to explore alternative solutions for your scenario here, and I will also pass on this use case to our Freshchat Product team, and will keep you updated. But I cannot commit on this since I am not sure if they will take this up since it may involve some significant changes on our backend architecture.
Hope you understand.