private void setupFirebaseAuth(){
        Log.d(TAG, "setupFirebaseAuth: setting up firebase auth");
        mAuth = FirebaseAuth.getInstance();
        onStart();

        mFirebaseDatabase = FirebaseDatabase.getInstance();
        myRef = mFirebaseDatabase.getReference();

        FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
        if(user != null) {
            // user is signed in
            Log.d(TAG, "onAuthStateChanged: sign_in: " + user.getUid());

            myRef.addListenerForSingleValueEvent(new ValueEventListener() {
                @Override
                public void onDataChange(DataSnapshot dataSnapshot) {
                    //1st check: Make sure the username is  not already in use

                    //add new user to the database

                    //add new user_account_setting to the database
                }

                @Override
                public void onCancelled(DatabaseError databaseError) {

                }
            });

        } else {
            Log.d(TAG, "setupFirebaseAuth: signed_out");
        }
    }