How to config metadata in keycloak Administration Console for RealmResourceProviderFactory

I have created a custom endpoint, I need to add some config metadata but I have no idea where to config the metadata in administration console.

You can‘t configure custom RealmResources through the admin console. The only way is to provide config data through SPI configuration: Configuring providers - Keycloak
You can access this data in the init(…) method of your Provider Factory class.

Thank you for your reply. Is there any document for which provider can be add custom config metadata in administration console? I know only UserStorageProviderFactory can be add custom config metadata.