title: Android Firebase how to add 'users' node
body: <p>I'm making a community app. I want the function. -&gt; When user A blocks user B user A immediately can not see user B's posts and comments.</p>
  <p>So I search for it. -&gt; <a href="https://stackoverflow.com/questions/50139809/how-to-block-users-on-firebase-in-a-social-media-app-for-ios">How to block users on Firebase in a social media app? for iOS</a></p>
  <p>In this advice, I have to make data structure like this.</p>
  <pre><code>users:
  uid1:
     my data: {
         // some stuff here
     }
  uid2:
     my data: {
         // some stuff here
     }
  </code></pre>
  <p>I want to make my data structure like this. But I'm using google auth like this.</p>
  <p><a href="https://i.stack.imgur.com/kwyjU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kwyjU.png" alt="enter image description here" /></a></p>
  <p>How can I copy this users info to the database structure? And can't firebase rules refer to screenshot's info?</p>