docs: def activate_license(self, key):
          """Activates iLO license.
  
          :param key: iLO license key.
          :raises: IloError, on an error from iLO.
          :raises: IloCommandNotSupportedError, if the command is not supported
                   on the server.
          """
          manager, uri = self._get_ilo_details()
          try:
              lic_uri = manager['Oem']['Hp']['links']['LicenseService']['href']
          except KeyError:
              msg = ('"LicenseService" section in Manager/Oem/Hp does not exist')
              raise exception.IloCommandNotSupportedError(msg)
  
          lic_key = {}
          lic_key['LicenseKey'] = key
  
          # Perform POST to activate license
          status, headers, response = self._rest_post(lic_uri, None, lic_key)
  
          if status >= 300:
              msg = self._get_extended_error(response)
              raise exception.IloError(msg)