Cannot link skill

I’ve created an account and activated via the email link and I am logged here in the community. However when I try to link the skill it tells me that its invalid credentials.

The community board login in independent from the Garadget login (one doesn’t require another).
Garadget login is the one that works in the mobile app and on the web: Doors
That’s the credentials you enter in the Garadget login form when linking third party services like Echo.