fix: Signup button sohwing even when logged in

Author: Lissy93

src/app/components/navbar/navbar.component.html

@@ -19,16 +19,18 @@ <h1 class="text-xl font-bold ml-2 text-primary relative">
       [attr.aria-label]="'Primary Navigation'"
     ></p-menubar>
 
-    <p-button
-      *ngIf="!isAuthenticated && (enableSignUp$ | async)"
-      routerLink="/login"
-      [queryParams]="{ newUser: 'true' }"
-      label="Sign Up"
-      size="small"
-      icon="pi pi-face-smile"
-      class="ml-1"
-      aria-label="Login"
-    />
+    <ng-template *ngIf="(enableSignUp$ | async)">
+      <p-button
+        *ngIf="!isAuthenticated"
+        routerLink="/login"
+        [queryParams]="{ newUser: 'true' }"
+        label="Sign Up"
+        size="small"
+        icon="pi pi-face-smile"
+        class="ml-1"
+        aria-label="Login"
+      />
+    </ng-template>
 
     <button
       pButton