So I've been doing some experimentation with Facebook integration for my app and noticed that the UserId that I was pulling from the Facebook plugin no longer matched my Facebook user id.
After some research, here are my findings:
- Since the Graph 2.0 API was introduced by Facebook, you are no longer going to get new user's Facebook User ID, instead Facebook will give you the "app-scoped user id". Near as I can tell, it's still unique, but definitely something to be aware of. I don't know if you can get the original user id based on an app-scoped user id.