title: Get devices token?
body: <p>I'm trying to get the token of my device. Thought this:</p>
  
  <pre><code>ParseInstallation parseInstallation = new ParseInstallation();
      String deviceToken = (String) parseInstallation.get("deviceToken");
  </code></pre>
  
  <p>would do the trick, but it doesnt, it returns null.
  Why?</p>