public IActionResult Index()
{
if (User.Identity.IsAuthenticated)
{
List <System.Security.Claims.Claim> c1 = User.Claims.Where(x => x.Type.Contains("mail")).ToList();
List <System.Security.Claims.Claim> c2 = User.Claims.Where(x => x.Type.Contains("givenname")).ToList();
List <System.Security.Claims.Claim> c3 = User.Claims.Where(x => x.Type.Contains("surname")).ToList();
string email = c1[0].Value;
string name = c2[0].Value;
string surname = c3[0].Value;
context.AddUserIfNotExists(name, surname, email);
}
return(View());
}