code: def addUsersToRole(self, rolename, users):
          
          params = {
              "f" : "json",
              "rolename" : rolename,
              "users" : users
          }
          rURL = self._url + "/roles/addUsersToRole"
          return self._post(url=rURL, param_dict=params,
                               securityHandler=self._securityHandler,
                               proxy_url=self._proxy_url,
                               proxy_port=self._proxy_port)
docs: Assigns a role to multiple users