Выход есть!

src/router/index.js

@@ -25,6 +25,7 @@ import ElToggles from "../layouts/sections/elements/toggles/TogglesView.vue";
 import ElTypography from "../layouts/sections/elements/typography/TypographyView.vue";
 import Project from "../views/LandingPages/Project/Project.vue";
 import Profile from "../views/LandingPages/Profile/Profile.vue";
+import TopSecretProject from "../views/LandingPages/Project/TopSecretProject.vue";
 
 
 const router = createRouter({
@@ -42,6 +43,12 @@ const router = createRouter({
       component: Project
     },
 
+    {
+      path: '/TopSecret',
+      name: 'topsecretproject',
+      component: TopSecretProject
+    },
+
     {
       path: '/profile/:id',
       name: 'profile',

src/views/LandingPages/Project/TopSecretProject.vue

@@ -0,0 +1,30 @@
+<!-- Шаблон для страницы, содержимое которой видно только зарегистрированным пользователям -->
+
+<script setup>
+
+import { computed } from "vue";
+
+// example components
+import DefaultNavbar from "@/examples/navbars/NavbarDefault.vue";
+import Header from "@/examples/Header.vue";
+
+
+const isAuthenticated = computed(() => !!sessionStorage.getItem('access_token')); // Computed property to check if the user is authenticated
+
+</script>
+
+
+
+
+<template>
+  <DefaultNavbar  />
+
+  <Header>
+    <div v-if="isAuthenticated">
+        <p>Наш главный секрет</p>
+    </div>
+    <div v-else>
+        <p>здесь ничего нет</p>
+    </div>
+  </Header>
+</template>

src/views/LandingPages/SignIn/BasicView.vue

@@ -118,6 +118,7 @@ export default {
                     <div v-if="isAuthenticated">
                         <!-- This will only be displayed if the user is authenticated -->
                         <p>Опять Ты!</p>
+                        <button @click="logout">Выход</button>
                     </div>
 
                     <div v-else>
@@ -146,7 +147,7 @@ export default {
                       </button>
 
                     </div>
-                      <button @click="logout">Logout</button>
+                      
                     </div>