The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.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/ce41c59a-256d-4577-a1bb-2c9cee79e66d?j=eyJ1IjoiMXMycmlmIn0.IImagkNbXT9WkA9xccfvjZOf_e7trO2AgjpcuPI6nvY