docs: def get_keys(self):
          """
          :calls: `GET /users/:user/keys <http://developer.github.com/v3/users/keys>`_
          :rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.UserKey.UserKey`
          """
          return github.PaginatedList.PaginatedList(
              github.UserKey.UserKey,
              self._requester,
              self.url + "/keys",
              None
          )