I'm working on extending the Wordpress plugin to limit blog signups to people who are already connected to me on Facebook. However when I hit /users/[token]/contacts.json I get a positive response code but I don't get any actual user information.
"message":"The contacts have been retrieved from the social network identity and the cache has been refreshed"
"cache_date_last_update":"Mon, 16 Feb 2015 03:36:22 +0100",
The count is 0 and no entries are passed back. I confirmed that my app has permission to see my friends list, not sure what I'm doing wrong.
You can see the update in their changelog here:
April 30th, 2014 - API Version v2.0
Friend list now only returns friends who also use your app: The list of friends returned via the /me/friends endpoint is now limited to the list of friends that have authorized your app