The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.
https://docs.google.com/forms/d/e/1FAIpQLSdfDovZoVV0NAmtom64z_k3oMa925IDC4VlKpMFruuMbZd5ow/viewform?pli=1