We could punnily label this dark pattern as (psychological) credential stuffing. They are breaching the psychological defenses of your wetware trust-service by

We could punnily label this dark pattern as (psychological) credential stuffing. They are breaching the psychological defenses of your wetware trust-service by re-purposing the same credentials you previously trusted elsewhere ;) ...and the double-entendre is they are fluffing up their own personal credentials by having a seemingly separate entity they control vouch for themselves as worthy of your attention.