Can't access friends's informations with the graph API
问题 I'd like to retrieve, for instance, a friend's birthday, using the graph API. So I pick a friend whose birthday my profile can see, go to the Graph API Explorer, generate an access token with the friends_birthday privilege, and input [friend_name]/?fields=birthday and... it doesn't return anything. The birthday field on the side is grayed out, with a mouse-over text that says "Field is empty or disallowed by the access token". The worst part is that it works fine for some friends, but not for