The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.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/63117c12-baa0-4684-8860-abb41751c98b?j=eyJ1IjoiMXMycmlmIn0.IImagkNbXT9WkA9xccfvjZOf_e7trO2AgjpcuPI6nvY