title: How to use `where` query to search for contents present in an array from Cloud Firestore using Flutter?
body: <p>The code which I am trying to write is</p>
  
  <pre><code>var username = ["user1", "user2", "user3", "user4", "user5",
                  "user6", "user7", "user8", "user9", "user10",
                  "user11", "user12", "user13", "user14", "user15"];
  await Firestore.instance.collection("uploads").where("name", isEqualTo: username).get()
  </code></pre>
  
  <p>Yet I am not able to get the documents from Firestore. How can this be solved?</p>