The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.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://linkprotect.cudasvc.com/url?a=https://consult.health.govt.nz/regulatory-policy/62d1d630/&c=E,1,7pHdZMkoAeiqpadJXHx3jRocAc03jbgPf3cHY105ibdkPzYcTU2if3do5Z08slu66raRBw77yKmMlNLEo_n3F8uErYbHAl3hZLiOPdIjLxQjHmfaVBz9H50,&typo=1