Extract UUSID during provider setup

In order to support other features, it's useful to have the UUSID of the acting service. This can be done during the configure stage of the provider. We are currently hitting a /whoami endpoint to validate the service is configured correctly. This endpoint also provides the UUSID of the acting service.

To store this, we will need to create a different provider config structure, as it is currently only the EdClient. This could open the door for additional config in the future.