FA GOOGLE LoginAnonymous-MainActivity-initialize

        // Initialize Firebase Auth
        mAuth = FirebaseAuth.getInstance();
        currentUser = mAuth.getCurrentUser();
        //initialization
        loginMessage = findViewById(R.id.loginMessage);
        progressBar = findViewById(R.id.progressBar);
        loginAnonymousbutton = findViewById(R.id.loginAnonymousbutton);
        linkAccountButton = findViewById(R.id.linkAccountButton);