test Login angepasst, return fail wenn formaDaten leer

src/routes/anmeldung/+page.server.ts

@@ -1,6 +1,6 @@
 import { dev } from '$app/environment';
 import { loginUser, logoutUser } from '$lib/server/authService';
-import { redirect } from '@sveltejs/kit';
+import { fail, redirect } from '@sveltejs/kit';
 import { ROUTE_NAMES } from '../index.js';
 
 export const actions = {
@@ -8,9 +8,13 @@ export const actions = {
 	logout: (event) => logoutUser(event),
 	getVorgangByToken: async ({ request, cookies }) => {
 		const data = await request.formData();
-		const vorgangToken = data.get('vorgang-token') as string;
+		const vorgangToken = data.get('vorgang-token');
 		const vorgangPIN = data.get('vorgang-pin') as string;
 
+		if (!vorgangToken || !vorgangPIN) {
+			return fail(400, { message: 'Token oder PIN fehlen' });
+		}
+
 		const COOKIE_NAME = `token-${vorgangToken}`;
 		cookies.set(COOKIE_NAME, vorgangPIN, {
 			path: '/',