身份验证拦截该如何设置呢？

import { BrowserRouter as Router, Switch, Route, Link }from "react-router-dom";
import React from"react"；
export default function App() {
return(
<Router>
<div>
<nav>
<ul>
<li><Link to="/">Home</Link></li>
<li><Link to="/about">About</Link></li>
<li> <Link to="/users">Users</Link></li>
</ul>
</nav>
<Switch>
<Route path="/about"><About /></Route>
<Route path-="/users"><Users /></Route>
<Route path="/"><Home /></Route>
</Switch>
</div>
</Router>
)；