Get the Facebook "User Access Token" after login
Dear Support Team,
I have written an Android app that uses Backendless 3.x and my users log in with Facebook using your SDK. I now realized that I need to access the birthday Facebook attribute of the user as well. For that, the normal app secret is not enough, I need a "User Access Token". That one seems to be only provided at login. How can I retrieve it at this point? Additionally, I originally wanted to access that value in the Server Code (Custom Business Logic), but I can't get that token directly on the Server, right?
Thank you in advance