[Banana Cake Pop] Expected Redirect Url for OAuth2

[dannyyy]

My instance of Banana Cake Pop is running under https://www.mydomain.com/graphql. What is the expected RedirectUrl for OAuth2? I tried https://www.mydomain/com/graphql and https://www.mydomain/com/graphql/. Bot both opens just a new browser tab but no token has been persisted somewhere. Therefor all the request return a 401.