I am a nodeJS developer. My actually use case is: I want to deploy hydra and kratos and use the user id provided by hydra/kratos. Also I want that I use jwt tokens to contain the scope of the tokens. So I assume I can manage the roles in kratos and when the user logs in I can consume the jwt token and depending on the scope/claims declared in the jwt token I can give permission to the specific rest api calls? Is there a way to get a webhook or so to give my system the information that the user was created?