Looking for logging into the Xaml site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Xaml site. After that you can login as usual with your login credentials.
https://www.c-sharpcorner.com/article/design-login-page-using-xaml-in-xamarin-forms/
https://github.com/CrossGeeks/Xamarin.Forms.UI/blob/master/UISampleApp/Views/Logins/LoginPage.xaml
https://blog.wilsonvargas.com/creando-un-simple-login-en-xamarin-forms/
https://code.msdn.microsoft.com/Easy-WPF-Login-Navigate-7a8d34a0/sourcecode?fileId=110632&pathId=580998945
https://code.msdn.microsoft.com/wpapps/Windows-Phone-Login-17725566
https://grialkit.com/portfolio-items/simple-login-page/
https://stackoverflow.com/questions/42662463/how-to-create-login-screen-uwp-c-xaml
http://forum.codecall.net/topic/64634-wpf-create-login-interface-using-only-xaml/
https://forums.xamarin.com/discussion/80895/how-to-create-simple-cs-for-login-and-password-combined-with-a-xamarin-forms-xaml-layout
http://bsubramanyamraju.blogspot.com/2015/03/windows-phone-login-application-sample.html