title: Facebook Graph API 2.2 mutual friends
body: <p>So I've been trying for this for a couple of days, trying to figure out how to use Facebook's Graph API v2.2 to get mutual friends between two users. I understand that I can only get the mutual friends between two users that are using the FB App and that's cool.</p>
  
  <p>The app has the following approved items:</p>
  
  <ul>
  <li>email</li>
  <li>public_profile</li>
  <li>user_birthday</li>
  <li>user_friends</li>
  <li>user_hometown</li>
  <li>user_location</li>
  <li>user_relationships</li>
  <li>user_website</li>
  </ul>
  
  <p>My scenario is this:</p>
  
  <ul>
  <li>A user (user A) register to the FB App</li>
  <li>Another user (user B) registers</li>
  <li>User A looks at the user B's profile</li>
  <li>The profile should display the mutual friends between the two users</li>
  </ul>
  
  <p>I've tried to play around in the Graph API Explorer </p>
  
  <p><code>/v2.2/app_scoped_user_id?fields=context.fields%28mutual_friends%29</code> <br />
  and <br />
  <code>/v2.2/user_id?fields=context.fields%28mutual_friends%29</code>. <br />These just returns an ID field with the ID I provided and nothing else.</p>
  
  <p>I'm all out ideas, and the docs isn't helping much either. Can someone explain how to do it?
  I will be using it in an Angular app but as long as I can get the URL to fetch the correct thing I can translate it into Javascript.</p>