The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.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/1FAIpQLScbpfEAd4a7IousBT3c8mVvDOgP3ZPK_fdN6wthuSJ6LUITig/viewform?usp=sf_link