code: def access_token(self, request_token, request_secret):
          
          logging.debug("Getting access token from %s:%d",
                        self.server, self.port)
          self.access_token, self.access_secret = \
              self._token("/oauth/accessToken", request_token, request_secret)
          return self.access_token, self.access_secret
docs: Returns access_token, access_secret