public async Task<IActionResult> Logout(LogoutInputModel model)
{
// build a model so the logged out page knows what to display
var vm = await _loggedOutViewModelBuilder.Build(model.LogoutId);
await _loginProvider.LogOut();
// check if we need to trigger sign-out at an upstream identity provider
if (vm.TriggerExternalSignout)
{
// build a return URL so the upstream provider will redirect back
// to us after the user has logged out. this allows us to then
// complete our single sign-out processing.
string url = Url.Action("Logout", new { logoutId = vm.LogoutId });
// this triggers a redirect to the external provider for sign-out
return SignOut(new AuthenticationProperties { RedirectUri = url }, vm.ExternalAuthenticationScheme);
}
return View("LoggedOut", vm);
}
