code: def add_to_emails(self, *emails):
          
          assert all(isinstance(element, (str, unicode)) for element in emails), emails
          post_parameters = emails
          headers, data = self._requester.requestJsonAndCheck(
              "POST",
              "/user/emails",
              input=post_parameters
          )
docs: :calls: `POST /user/emails <http://developer.github.com/v3/users/emails>`_
          :param email: string
          :rtype: None