title: How to get the firebase topics that I am subscribed to?
body: <p>I'm using Firebase in an Android app and I need to know all topics that a device is subscribed. I know I can do that using Google Instance Id API with a GET request to: </p>
  
  <pre><code>https://iid.googleapis.com/iid/info/[token]?details=true
  </code></pre>
  
  <p>Sending the <code>api_key</code> as "Authorization" header but I wanna know if there is another way to do this from Firebase SDK?</p>