getFriends :: Token
           -> String -- ^ screen name
           -> IO (Result [TwitterUser])
getFriends tok screen_name = getFriends' tok screen_name (-1)
getFriends :: Token
           -> String -- ^ screen name
           -> IO (Result [TwitterUser])
getFriends tok screen_name = getFriends' tok screen_name (-1)
getFriends tok screen_name = getFriends' tok screen_name (-1)