Hi!
As I stated in some previous post
No popup is allowed, so the solution apple was proposing was the integrate the whole login thing into a webview so no transition happens. The issue is that I could not find the way to implement the webview. I could call the website somehow from the webview but no idea how to handle if the user logs in.
You don’t have to convince me, I completely understand, but apple thinks otherwise 
Thanks,
Helmuth