I have the same issue. Firefox, Windows 10; also Firefox, macOS.
I don't see myself in the New Users list on the main page. Perhaps it's completing the authorization on Spotify's end, but not creating the user account on the Digs end?
I don't see myself in the New Users list on the main page. Perhaps it's completing the authorization on Spotify's end, but not creating the user account on the Digs end?