title: Query elements in differnet orders without doublons in Firestore
body: <p>I'm implementing a quizz and want to fetch questions from a Firestore. </p>
  
  <p>How can I query questions one by one from the DB in a different order between players but being sure that I never show twice the same question to the same player.</p>
  
  <p>Is it possible to give an array of IDs that I already fetched ? Or is there another solution that can help me ?</p>