Is your feature request related to a problem? Please describe.
Client creation rest api does not allow to associate a service account to a client specifying claims , subject , scopes of the service account..

Describe the solution you'd like
It could be very useful to be able to associate a service account to the client with subject claims and scopes to be used with "Client Credential flow"

Additional context
The following solutions allow this
https://developers.google.com/identity/protocols/OAuth2ServiceAccount
https://www.keycloak.org/docs/latest/server_admin/index.html#_service_accounts
https://kubernetes.io/docs/reference/access-authn-authz/authentication/