Developer Questions

As I saw in the login of the developer console, xumm is using auth0 also. I just don't seem to be able to get it configured correctly. When my unified login shows up, I cannot reach the QR Code scan a validate with my Xumm app. After I signed the sign-in transaction I am redirected, but still on the Auth0 login screen. In other terms the back and forth didn't help. Am I missing something, do I need a rule in Auth0 to get it working properly?

What would be the best approach to getting users to log in using Xumm? E.g., https://www.xrptoolkit.com/ and its "connect wallet" feature.