title: Find Facebook friends who have existing accounts on Spotify
body: <p>Found out that Spotify Web API does not have an available endpoint for the current user's list of followed users.</p>
  
  <p>So I was wondering if there is a way through the Facebook API to get a list of friends who has a Spotify account? </p>
  
  <p>And for the friends with a Spotify account - getting their Spotify user IDs?</p>
  
  <p>Thank you very much. </p>