title: How to get a nested object in firebase database
body: <p>Well we have a problem. We are quiet new with firebase and are having some problems with trying to get some FK( or refferences of othre databases) in a new database.</p>
  
  <p><img src="https://i.gyazo.com/ca8198664f7f187d48183888f95263b2.gif" alt="firebase" title="firebase"></p>
  
  <p>in the field user i want to get a refference to the table users. So when i try to get data from the table Accounts &amp; check on a userID i should be able to get the user_tracklist instead of making 2 query's</p>