Values:
RENEWAL_METHOD_UNSPECIFIED (0):
The renewal method is undefined.
AUTOMATIC_RENEWAL (1):
The domain is automatically renewed each year .
To disable automatic renewals, delete the resource by
calling `DeleteRegistration` or export it by calling
`ExportRegistration`.
MANUAL_RENEWAL (2):
The domain must be explicitly renewed each year before its
`expire_time`. This option is only available when the
`Registration` is in state `EXPORTED`.
To manage the domain's current billing and renewal settings,
go to `Google Domains <https://domains.google/>`__.