How to confirm if user is logged out in flutter realm app service

When I logout and login second time old session token is also there, so how to confirm if user is logged out from realm app service in flutter. As old session token is still showing in some page of the app.

Future<void> _handleSignOut() async {
    await app.currentUser?.logOut();
    await FirebaseAuth.instance.signOut();
    GoogleSignIn googleSignIn = GoogleSignIn();
    await googleSignIn.disconnect();

I integrate realm with firebase and goodle sign in