preparing svelte login, mastered translations

frontend/src/App.svelte

@@ -1,6 +1,8 @@
 <script>
     import { onMount } from 'svelte';
-    import { loadTranslation } from './translations.svelte.js'
+    import { loadTranslation } from './translations.svelte.js';
+    import { user } from './user.svelte.js';
+
     let translations_ready = false;
     onMount(async () => {
         await loadTranslation('de','Login');
@@ -12,10 +14,13 @@
     import Menu     from "./Components/Menu.svelte";
 </script>
 
-{#if translations_ready}
+{#if translations_ready }
+{#if user.username }
 <Menu />
 <Homepage />
+{:else}
 <Login />
+{/if}
 {:else}
     <p>Loading translations...</p>
 {/if}