如何在laravel中为用户和管理员使用两个表？

Question

我为管理员和用户创建了两个表，

管理员表：

+------------+---------------------+------+-----+---------+----------------+
| Field      | Type                | Null | Key | Default | Extra          |
+------------+---------------------+------+-----+---------+----------------+
| id         | bigint(20) unsigned | NO   | PRI | NULL    | auto_increment |
| name       | varchar(255)        | NO   |     | NULL    |                |
| email      | varchar(255)        | NO   |     | NULL    |                |
| password   | varchar(255)        | NO   |     | NULL    |                |
| created_at | timestamp           | YES  |     | NULL    |                |
| updated_at | timestamp           | YES  |     | NULL    |                |
+------------+---------------------+------+-----+---------+----------------+

用户表：

+------------+---------------------+------+-----+---------+----------------+
| Field      | Type                | Null | Key | Default | Extra          |
+------------+---------------------+------+-----+---------+----------------+
| id         | bigint(20) unsigned | NO   | PRI | NULL    | auto_increment |
| name       | varchar(255)        | NO   |     | NULL    |                |
| mobile     | varchar(255)        | NO   |     | NULL    |                |
| created_at | timestamp           | YES  |     | NULL    |                |
| updated_at | timestamp           | YES  |     | NULL    |                |
+------------+---------------------+------+-----+---------+----------------+

然后我创建了管理员模型：

namespace App;

use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;

class Admin extends Authenticatable
{
    use Notifiable;
}

并在config/auth.php中更改配置：

'defaults' => [
    'guard' => 'user',
    'passwords' => 'users',
],

'guards' => [
    'user' => [
        'driver' => 'session',
        'provider' => 'users',
    ],

    'admin' => [
        'driver' => 'session',
        'provider' => 'admins',
    ],

    'api' => [
        'driver' => 'token',
        'provider' => 'users',
        'hash' => false,
    ],
],

'providers' => [
    'users' => [
        'driver' => 'eloquent',
        'model' => App\User::class,
    ],
    'admins' => [
        'driver' => 'eloquent',
        'model' => App\Admin::class,
    ],
],

为了进行测试，我通过用户使用以下方式登录：

$user = User::find(1);
Auth::guard('user')->login($user);

它可以工作，我可以使用Auth::user()获取用户信息，但是当我想通过管理员登录时，可以使用：

$admin = Admin::find(1);
Auth::guard('admin')->login($admin);

我没有收到任何错误，但用户未登录，我该如何解决？