title: How to broadcast message to all registered users with sinch and parse?
body: <p>I am trying to implement a shoutbox for Android app. I am following the tutorial below and works perfectly for me:
  <a href="https://www.sinch.com/tutorials/android-messaging-tutorial-using-sinch-and-parse/" rel="nofollow">https://www.sinch.com/tutorials/android-messaging-tutorial-using-sinch-and-parse/</a></p>
  
  <p>My problem is that right now, I get a list of all registered users on Parse and then send a message to each one of them using Sinch:</p>
  
  <pre><code>messageService.sendMessage(groupUserIdList, messageBody);
  </code></pre>
  
  <p>I may potentially have thousands of users so the groupUserIdList will be huge. This looks inefficient and I am looking for a better way to do this.</p>
  
  <p>Does Sinch offer a broadcast, such that I can send messages to all registered users without creating the groupUserIdList everytime?</p>