title: Query a list of documents in firestore using an array
body: <p>Is is possible to query a list of documents in firestore using an array of IDs?</p>
  <pre><code>const UserIDs = ['zHYYvrVPLA9LOV6edwOrQhQLt6k1', 'JhUvvrNbfD9LOV6edwOrQhQLt8Gf'
  '] //each ID in the array is an existent document id in the collection Users
  
  const selectedUsers = await firestore().collection('Users').doc(UserIDs).get();
  </code></pre>
  <p>selectedUsers.data() is undefined despite that the documents with the given IDs exists. I know I can perform a loop, I was just wondering if the way I tried is possible.</p>