title: How do you block users on Firebase?
body: <p>I'm using Firebase for my app and was wondering how to block certain users. I see on the Auth tab of the console, there are "delete" and "disable" options. What do those do? I haven't been able to find documentation on that. Will one of those allow me to block a user?</p>
  
  <p>What I mean by blocking a user is for the <code>".read": "auth != null"</code> rule to prevent him from accessing data on the database</p>