Repeat after me:

  * _Registration_ is not _Authentication_ is not _Authorization _is not _Utilization._
  * _Registration_ is not _Authentication_ is not _Authorization_ is not _Utilization.__ _
  * _Registration_ is not _Authentication_ is not _Authorization_ is not _Utilization._

I'll keep reminding myself of that until I figure out how to disentangle the four from this damned Facebook app.  Registering to use the app is not the same thing as authenticating to use the app, and it's definitely not authorization to determine your level access.  Nor is any of this related to callbacks to the social application network to give you things like lists of friends and writing on your wall; that's outside the responsibility of SocialAuth anyway.