title: Finding a specific field in firestore with an id
body: <p>I know this is a very basic question, but I am new to reactjs and firebase. After two days I am giving up on searching for an answer myself. </p>
  
  <p>I have a firestore database 'MusicList' containing several documents. Within these documents the field 'seperatedStrings' holds (you'll probably will be guessing it) artists and titles of songs.
  <a href="https://i.stack.imgur.com/UI0PQ.png" rel="nofollow noreferrer">image of the firestore database</a></p>
  
  <p><strong>How do I retrive the value a single field</strong> (in this example 'seperatedString') <strong>using the ID</strong> (in this example '5ajnHZ8YDaiYvTAvJ1ec'?</p>
  
  <p>Whenever I am querying for this:</p>
  
  <p><code>firestore().doc("MusicList/" + "5ajnHZ8YDaiYvTAvJ1ec").seperatedString</code></p>
  
  <p>the console claims that it is "undefined" (That is a lie!), I'd expect 'Phil Upchurch Blackgold'</p>
  
  <p>Thanks in advance.</p>