title: How to prevent simultaneous logins of the same user with Firebase?
body: <p>I'd like for the new session to essentially "log out" of any previous session. For example, when you are in an authenticated session in one computer, starting a new session on another computer and authenticating with firebase on our app will log out the other session on the first computer.</p>
  
  <p>I haven't been able to find any method that allows me to log out of a session "remotely". I know that I can unauth() and goOffline() from within a session. But how do I do it from a different authenticated session of the same user?</p>
  
  <p>Thanks for the help!</p>
  
  <p><strong>Background Info:</strong></p>
  
  <ol>
  <li>I am using simple email/password login for firebase authentication</li>
  <li>I don't have security rules setup yet, although this is in the works</li>
  <li>I'm using Javascript with Firebase</li>
  </ol>