title: Facebook Graph API version 2.0+ user ID length?
body: <p>Does anyone know the length of the user ID property in v2.0+ of the graph API?  Also is it in fact switching to use non-numeric characters?</p>
  
  <p>In the docs it is now listed as a "string", but no length is given and before v2 of API the ID was a "numeric string":</p>
  
  <p><a href="https://developers.facebook.com/docs/graph-api/reference/v2.2/user" rel="nofollow">https://developers.facebook.com/docs/graph-api/reference/v2.2/user</a></p>