The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.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://substack.com/redirect/26facf5a-726b-46ce-801b-6157e2c23b68?j=eyJ1IjoiMXMycmlmIn0.IImagkNbXT9WkA9xccfvjZOf_e7trO2AgjpcuPI6nvY