title: Access firestore value
body: <p>This is firestore database structure. I'm trying to call these data in my flutter application. but I only get value upto document which is chatroom/9000. But i want collection of document 9000. How do i call it?</p>
  <p>This is how i called query</p>
  <pre><code>await _firestore .collection('chatroom') .doc(UUID) .get() .then((value) { });
  </code></pre>
  <p><a href="https://i.stack.imgur.com/nzn25.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/nzn25.png" alt="enter image description here" /></a></p>