Lumen登录总是返回Unauthorized

Question

使用正确的用户名和密码登录，但重定向到＆＃39; /＆＃39;，始终返回＆＃39; Unauthorized＆＃39;我该怎么办？

routes.php

$app->get('auth/login', 'Auth\AuthenticationController@getLogin');
$app->post('auth/login', 'Auth\AuthenticationController@login');
$app->post('auth/register', 'Auth\AuthenticationController@register');

$app->group(['middleware' => 'auth'], function () use ($app) {
    $app->get('/', 'ExampleController@index');
});