title: Test if user has application installed with Graph API
body: <p>What is the most current method to determine if a Facebook User has installed an application? I see that there is an "installed" field on the "permissions" connection of a user object, but that requires an access_token to test. What happened to isAppUser and why does <a href="https://developers.facebook.com/docs/reference/rest/users.isAppUser/" rel="nofollow">this URL</a> say the following:</p>
  
  <blockquote>
    <p>Please use the Graph API User object and GET /[UID]?field=installed to
    check if a user is has TOSed that app.</p>
  </blockquote>
  
  <p>The referenced /[UID]?field=installed does nothing.</p>