The endpoint provides a method to retrieve the status of an individual course whether currently assigned or not. The requests are HTTP GET (RFC2616) and uses candidate_ref as a resource identifier identifying the candidate uniquely at HB and the course_id to identify the course for which the status is requested.If the candidate_ref is unknown the response should be HTTP 404 Not Found. If there’s no historical data from a previous assignment, the API should send an HTTP 204 No Content response.NOTE: API will return all dates in GMT (UTC+0) timezone only.