The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.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://urldefense.proofpoint.com/v2/url?u=https-3A__www.health.govt.nz_your-2Dhealth_conditions-2Dand-2Dtreatments_diseases-2Dand-2Dillnesses_measles&d=DwMFAg&c=NSQ7T1B5-FPSFMM525RIjQ&r=PTVbNzrEecv3xPPuwD16WPF_zfip19cc6qHnnsOT330&m=M4LIkqHTJR_o0l_CcUKnMOViI2i5jeBsb1YQ2RUdQEU&s=3X4GA4FE-FUyUVVtSHi2MGhGOamOxUVKCo6W6tBRUOo&e=