proper state management to render username of get started button

src/components/Header.tsx

@@ -26,7 +26,7 @@ const userMenuItems = [
 ];
 
 export default function Header() {
-  const [isLoggedIn, setIsLoggedIn] = useState(false);
+  const [isLoggedIn, setIsLoggedIn] = useState(!!getToken());
   const [isMenuOpen, setIsMenuOpen] = useState(false);
   const [isUserMenuOpen, setIsUserMenuOpen] = useState(false);
   const { cartItems } = useCart();