Changes to Get the current caller's identity, role, and KB clearance

added the optional property is_internal to the response with the 200 status

added the optional property retry_after to the response with the 400 status

added the optional property retry_after to the response with the 401 status

added the optional property retryable to the response with the 400 status

added the optional property retryable to the response with the 401 status