Constant Contact OAuth Setup?

Has anyone setup OAuth for Constant Contact before?
Or would anyone know what the User Profile Endpoint would be?
(Docs -

I am struggling to get it working, the redirect to the login page goes directly to the regular Login page and not the OAuth flow. My current setup is below, but I have tried multiple combinations


The only thing is that the response will not contain an id field. I suggest you to try to use email too