refactoring magic strings: User API URLs in user-management view

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

@@ -1,6 +1,7 @@
 <script lang="ts">
 	import { onMount } from 'svelte';
 	import Button from '$lib/components/Button.svelte';
+	import { API_ROUTES } from '../../index.js';
 
 	const { data } = $props();
 
@@ -20,7 +21,7 @@
 	});
 
 	async function getUsers() {
-		const URL = '/api/users';
+		const URL = API_ROUTES.USERS;
 
 		try {
 			const response = await fetch(URL);
@@ -42,7 +43,7 @@
 			return;
 		}
 
-		const URL = '/api/users';
+		const URL = API_ROUTES.USERS;
 		const userData = { userName: userName, userPassword: userPassword };
 
 		try {
@@ -78,7 +79,7 @@
 	}
 
 	async function deleteUser(userId: string) {
-		const URL = `/api/users/${userId}`;
+		const URL = API_ROUTES.USER(userId);
 
 		try {
 			const response = await fetch(URL, {