This endpoint retrieves the result document in PDF format that should be forwarded to the employer.If the screening process finished successfully and the document is available, the response is an HTTP 200 OK, application/pdf or application/octet-stream and it wraps a binary data stream for the file content. If the submission_ref is not valid then the API should response with HTTP 404 Not Found error. If the screening process has not finished yet the response should be HTTP 202 Accepted without any other data. If the candidate screening process did not result a downloadable certification, most likely because further information is required before the process can be completed, the API should send an HTTP 204 No Content response.