How to separate user roles in firebase?

Question

How do I add user role authentication in firebase android app? From what I see, firebase only has email and password authentication. I want to develop an android app that has 2+ user roles. For example, if a normal member logs in, he will go to normal_memberActivity and if he's a premium member, he'll go to premium_memberActivity. How do I add roles in firebase? Wasn't able to find a similar problem like mine.

Normally, I would do it like this:

String role = intent.getStringExtra("role");

if (role.equals("admin")){
FragmentManager fm = getSupportFragmentManager();
fm.beginTransaction().replace(R.id.content_frame, new AdminHomeFragment()).commit();
}else{
FragmentManager fm = getSupportFragmentManager();
fm.beginTransaction().replace(R.id.content_frame, new NormalFragment()).commit();
}

Answer 1

You can add a roles node in the firebase database storing the user's uid and their role.

"roles" : {
    "uid1" : "normal",
    "uid2" : "premium",
    "uid3" : "normal",
}

Then you can get the role value after the user is successfully signed in

ref.child("roles").child(firebaseUser.getUid()).addListenerForSingleValueEvent(new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        String role = dataSnapshot.getValue(String.class);
        // check role and replace fragment
    }
    @Override
    public void onCancelled(DatabaseError databaseError) {}
});