title: How to connect two users in firebase?
body: <p>I want to create a chat app and I want to create rooms inside.</p>
  
  <p>The rooms should be created to chat with other users on the app.</p>
  
  <hr>
  
  <p>I want to know how to connect two users</p>
  
  <p>where when someone creates a room to chat with you you should see the room too in your account and </p>
  
  <p>start chatting together.</p>