The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.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/1FAIpQLScvJz45iLMixlhI8V2nWZdRhj4CLTvC4_JZPo_LeU5FDkcTZA/viewform?vc=0&c=0&w=1