Silent sign in to retrieve token with GoogleApiClient

Question

I am using \"Google Sign-In\" in my app. Hence I use the class GoogleApiClient to get the user email and the ID token that I need for my backend.

When the user signs

Answer 1

To add to the two answers above by Isabella and Ola, if you're using the new sign in lib with Firebase:

FirebaseAuth.getInstance().currentUser?.let{ 
    //create sign-in options the usual way
    val googleSignInClient = GoogleSignIn.getClient(context, gso)
    googleSignInClient.silentSignIn().addOnCompleteListener {
        val account: GoogleSignInAccount? = it.result
        //get user info from account object
    }
}

Also, this can be called from the UI thread. FirebaseAuth.getInstance().currentUser will always return the user object if you have signed in once before.