title: get admin_creator of a post Facebook api
body: <p>I need to get the userid of the person who creates the post, and based on the documentation: <a href="https://developers.facebook.com/docs/graph-api/reference/v2.9/post#read" rel="nofollow noreferrer">https://developers.facebook.com/docs/graph-api/reference/v2.9/post#read</a></p>
  
  <p>This information is in the admin_creator field. Example:  <code>{post-id}?fields=admin_creator</code> I am already the admin of the page and <code>manage_pages</code> permission, so I dont understand what is going on... Thanks!</p>