ios - Firebase Auth Login must allow single device login

Question

I am developing app with the help of Firebase backend and I am using Firebase Auth for login into my application. I have done all integration and every thing and my app is working fine.

But I want only single session with single user as right now with single userId I am able to login through multiple devices.

So I want to restrict user that at a time user can login in in single device.

I am using Custom auth with username password login :

Auth.auth().signIn(withCustomToken: customToken ?? "") { (user, error) in
  // ...
}

If user login with same id in another device I want to show alert that "You are already logged in another device".

Is there any possibility in Firebase Auth lib for single user single session?

Edit : Suggested duplicate question will not solve my query fully though it help me to understand scenireo and help to solve my problem.

Thanks @Frenk for pointing this out.

Answer 1

Waitting for answers