| Type: | string |
| Context: | sighup |
| Restart: | false |
| Since: | 18 |
The library/libraries to use for validating OAuth connection tokens. If only one validator library is provided, it will be used by default for any OAuth connections; otherwise, all oauth HBA entries must explicitly set a validator chosen from this list. If set to an empty string (the default), OAuth connections will be refused. This parameter can only be set in the postgresql.conf file.
Validator modules must be implemented/obtained separately; PostgreSQL does not ship with any default implementations. For more information on implementing OAuth validators, see oauth-validators.