Logout does not remove online user in Firebase!

[hughred22]

Your logout code has problem. You are missing the value to pass in $getRecord(). I change the code into follow:
if (onlineUsers) {
var presenceId = UserFactory.getPresenceId();
console.log ("presenceId is " + presenceId);
var user = onlineUsers.$getRecord(presenceId);
console.log ("User is " + user);
onlineUsers.$remove(user);
}

And it remove the user from online user list. But we still have a BIG ISSUE: What if user session expire? It will kick the user out but it will not delete the online user.

I want to know how you use $onAuth to deal with session expire issue. Basically I want to figure out all the best practices to deal with user login, logout, and session management with Firebase and Ionic...

[arvindr21]

Take a look at: https://www.firebase.com/docs/web/libraries/angular/guide/user-auth.html#section-auth-state for session state detection.