The prompt=none approach is what I am taking. Unfortunately, prompt=none with an https redirect redirects within the browser that is opened - even though the https redirect is an app link that should return to the app. The in-app browser method works with Alexa’s linking flow so I’m not sure what Auth0 is doing differently. Is there a way to turn off validation of the redirect_url so that I can use com.app.app notation for auth0 and https for alexa?
Or is this to say that there are no companies linking Alexa using Auth0?