laravel,Auth::basic()和Auth::onceBasic()的区别是什么？

Question

Route::get('/', function (Illuminate\Http\Request $request) {

    dd(Auth::basic(),Auth::onceBasic(),$request->cookie(),$request->session(),Auth::id(),Auth::check(),Auth::user());
})->middleware('auth.basic.once');

Route::get('/base', function (Illuminate\Http\Request $request) {

    dd($request->cookie(),$request->session(),Auth::id(),Auth::check(),Auth::user());
})->middleware('auth.basic.once');

如上我的代码，auth.basic.once和auth.basic互相替换了一次，我作为用户操作时，感觉没区别啊，都只是登录一次，/和/base就都能访问了。
官方文档如下，http://d.laravel-china.org/do...

Route::get('api/user', function () {

})->middleware('auth.basic.once');

Route::get('api/user', function () {

})->middleware('auth.basic');

又谁能说下具体用法吗