I am trying to Impersonate user based on current session user but getting nothing on
string identityName = HttpContext.Current.User.Identity.Name;
identityName variable is empty.
currently we are using Tridion Sites 9.1, and it is enabled with adfs SAML 2.0.
custom page webapplication is added under Tridion Sites -> Custom Page
Could someone please help/suggest me on this.