[Satosa-dev] controlling NameID format and value sent to SP

Yes. In effect, the frontend configures its metadata but what it will finally send is depending upon what the backend returned. The backend is configured on its own and that configuration may differ. The backend may not even talk saml. So, how the received claims or attributes or NameID are transformed to the format that the frontend needs should be implemented by a micro-service (which can be as complex as you want). Right now, that micro-service will need to be configured again, or imply that the NameID format needed is "x", as the micro-service does not have access to the frontend configuration. If it did, it could be clever and always try to construct the NameID value with a correct format, without the user having to keep the two (the frontend configuration and the micro-service configuration) settings in sync. Maybe it's time to make those available through the context object.