//security check can be hardcoded
	if (user.WebUserName == "userName" && user.WebPassword == "password")
	{
		user.AddSecurityGroup("SEAL");
	}
	else {
		throw new Exception("Invalid user name or password");
	}

	user.Identity = Impersonator.CheckWindowsLogin(user.WebUserName, user.Security.GetValue("default_domain_name"), user.WebPassword);
	
    if (user.Identity != null) 
    {
        user.Name = user.WebUserName;
		if (user.Security.GetBoolValue("add_windows_groups"))
		{
			user.AddWindowsGroupToSecurityGroup(user.Security.GetBoolValue("windows_groups_skip_domain"), user.Security.GetValue("windows_groups_ad_context"));
		}
		else 
		{
			user.AddDefaultSecurityGroup();
		}
		
		if (user.SecurityGroups.Count == 0)		
		{
			user.Error = "The user is authenticated but he does not belong to any security group.";        
		}

        //User default culture, theme and logo can be also overwritten with
        //user.SetDefaultCulture(group.Culture);
        //user.SetDefaultTheme(group.Theme);
        //user.SetDefaultLogoName(group.LogoName);  
    }
    else 
    {
        user.Error = "The user is not authenticated by Windows.";        
    }