Question on empty email field of Firebase Auth User using Facebook and Google+ Integration (Android Firebase SDK)

[Muhammad Rayhan]

Hi all,

I have successfully deployed tutorial code from https://firebase.google.com/docs/auth/android/facebook-login and https://firebase.google.com/docs/auth/android/google-signin for integrating Firebase Auth logins with Facebook and Google+. The users successfully created in Firebase Auth console.

However, I noticed that the Email field in the user object is empty (—). Strangely, I successfully retrieved the email information directly from provider result objects using GraphRequest (for facebook) and GoogleSignInResult (for Google+)

Based on the documentation I read (https://firebase.google.com/docs/reference/android/com/google/firebase/auth/FirebaseUser.html#getEmail()), the email field should be populated from login providers.

Is there something I miss or did I do something wrong?

[Muhammad Rayhan]

Hi, just want to add some information on the issue, when I try Facebook Login using Firebase Android SDK:

1. After successful login, the onAuthStateChanged is called twice. The value of firebaseAuth.getCurrentUser().getProviderId() is "Firebase" on both ocassion

2. I try to list down the providers from the FirebaseUser object, user.getProviderData(). I got two providers: "firebase" and "facebook.com"

3. When I tried to update email using FirebaseUser.updateEmail(), I got this error: An internal error has occured. [ EMAIL_EXISTS ]