[keycloak-dev] Keycloak usage scenario

I have Angular application that calls Spring Boot based rest API. Angular application can authenticate with KeyCloack, in fact I was thinking about using Keycloak ability to register user as well. In my application I have a need to provision logged this user in my database or update their information after they login. Since Spring Boot API app is stateless and we use JWT token to authenticate saving user into the database on every request would not be efficient. Anybody run into the scenario like this ? How did you solve it?