I just upgraded Android Studio to version 2.2, I'm on the stable channel.

I then adjusted the build.grade file by bumping the version of `compile 'com.google.firebase:firebase-auth:x.x.x'` to `9.4.0`, which is currently the latest version.

After syncing the project I am no longer able to use

`import com.google.firebase.auth.AuthCredential;`

`import com.google.firebase.auth.AuthResult;` and

`import com.google.firebase.auth.FirebaseUser;`

The online docs for Firebase don't mention anything related to this issue.

What could be going on here?