<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def addUsersToRole(self, rolename, users):
 """ Assigns a role to multiple 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)