title: When I want one object out of an firebaselistobservable using rxjs, should I still use subscribe?
body: <p>I am kind of confused about which methods belong with and when to use them. </p>
  
  <p>Right now, I am using subscribe for basically everything and it is not working for me when I want a quick static value out of Firebase. Can you explain when I should use subscribe vs other methods other than for a strict observable?</p>