OK. Going back to the initial issue… where is the login callback /signin-auth0 defined? And can this be safely changed without breaking the login flow?
Also, what is the name of the cookie that should be set after a successful login? The only cookie I see getting set in the test project that works is a session cookie called .AspNet.Cookies
Thank you for your time looking into this. We already committed to using Auth0 in a couple of our projects and I have to get it working somehow!