Added SLO callback

app/routes/logout/callback.tsx

@@ -0,0 +1,15 @@
+import { LoaderArgs, redirect } from '@remix-run/node';
+import { logout } from '~/session.server';
+
+//Logout, destroying the session with Starchart
+export const loader = async ({ request }: LoaderArgs) => {
+  const url = new URL(request.url);
+
+  const SAMLResponse = url.searchParams.get('SAMLResponse');
+
+  if (SAMLResponse) {
+    return await logout(request);
+  } else {
+    return redirect('/');
+  }
+};