protect admin pages after refactoring

src/routes/(angemeldet)/user-management/+page.server.ts

@@ -0,0 +1,8 @@
+import type { PageServerLoad } from '../../(token-based)/view/$types';
+import { error } from '@sveltejs/kit';
+
+export const load: PageServerLoad = async (event) => {
+	if (!event.locals.user) {
+		error(404, 'Not Found')
+	}
+};