title: Is there an easy way to find a Facebook user's ID?
body: <p>I need users to fill-in their Facebook IDs (a.k.a. "Admin IDs") in order to set the "fb:admins" property. There is no easy way to get the ID on Facebook but the value exists in their cookies (c_name).</p>
  
  <p>I know it's not possible to read the cookies. Is there a way to get the ID or even just to show it to viewers so they can copy/paste it? Maybe by using OAuth? If getting the "fb:app_id" is possible - that works for me as well.</p>