FirebaseAuthentication.WPF (nuget): FirebaseUI for WPF.  The library provides a drop-in auth solution that handles the flows for signing in users with email addresses and passwords, Identity Provider Sign In including Google, Facebook, GitHub, Twitter, Apple, Microsoft, Yahoo and anonymous sign-in.
Keywords: Firebase|FirebaseUI|Auth|Authentication|OAuth|Apple|Google|Facebook|Github|Twitter|firebase|firebase-authentication|firebase-database|firebase-realtime-database