如何根据用户身份验证在react路由器中显示不同的导航栏？

npm install react-router-dom

import { BrowserRouter as Router, Route, Link } from 'react-router-dom';

const Navbar = ({ isAuthenticated }) => {
  return (
    <nav>
      <ul>
        <li><Link to="/">Home</Link></li>
        {isAuthenticated && <li><Link to="/dashboard">Dashboard</Link></li>}
        {!isAuthenticated && <li><Link to="/login">Login</Link></li>}
      </ul>
    </nav>
  );
};

const App = () => {
  const isAuthenticated = /* 根据认证结果获取用户身份验证状态 */;

  return (
    <Router>
      <Navbar isAuthenticated={isAuthenticated} />
      <Route exact path="/" component={Home} />
      {isAuthenticated && <Route path="/dashboard" component={Dashboard} />}
      {!isAuthenticated && <Route path="/login" component={Login} />}
    </Router>
  );
};