Identifying Facebook Messenger user with UserID from a Facebook Login
问题 I am trying out the new Facebook Messenger Platform and have hit a bit of a problem. When a user first chats with my Bot, I want to use the sender.id to lookup the user in my DB and verify whether they're a customer or not and offer a more tailored UX. User's sign up to my service using Facebook Login, but unfortunately it appears my App's Facebook ID & my Bot's Facebook ID are different due to IDs being limited to App-scopes. Is there any way associate the 2 IDs to allow me to find a user in