Firabase_auth

Screenshots

               

for more information about Google Sign In :

• Authenticate Using Google Sign-In on Android
• Integrating Google Sign-In into Your Android App

for more information about Facebook Sign In

• Authenticate Using Facebook Login on Android
• Facebook Login for Android

Sign in using Password-Based Accounts on Android :

• Authenticate with Firebase using Password-Based Accounts on Android

when you try to sign in with google then with facebook with the same email you'll get FirebaseAuthUserCollisionException to fix this erreur