code: def set_user_attribute(self, user_name, key, value):
          
  
          res = self._make_ocs_request(
              'PUT',
              self.OCS_SERVICE_CLOUD,
              'users/' + parse.quote(user_name),
              data={'key': self._encode_string(key),
                    'value': self._encode_string(value)}
          )
  
          if res.status_code == 200:
              tree = ET.fromstring(res.content)
              self._check_ocs_status(tree, [100])
              return True
          raise HTTPResponseError(res)
docs: Sets a user attribute
  
          :param user_name: name of user to modify
          :param key: key of the attribute to set
          :param value: value to set
          :returns: True if the operation succeeded, False otherwise
          :raises: HTTPResponseError in case an HTTP error status was returned