Returns up to 100 friends of a given user, ordered by {order}
http://api.needish.com/users/friends/{user_id}/{order}.format
| user_id | Required. The id or nickname of the user for whom to request a list of friends. |
| order | Optional (id). Valid values are "id", "name", "activity" (recent logged first) |
| limit | Optional (20). Limits the number of friends to retrieve. |
| page | Optional (1). The page to retrieve. |
