在凭据不在同一数据库中的laravel中创建登录

'connections' => [
    'mysql' => [
        'driver' => 'mysql',
        'host' => env('DB_HOST', 'localhost'),
        'port' => env('DB_PORT', '3306'),
        'database' => env('DB_DATABASE', 'database'),
        'username' => env('DB_USERNAME', 'username'),
        'password' => env('DB_PASSWORD', 'password'),
        'charset' => 'utf8mb4',
        'collation' => 'utf8mb4_unicode_ci',
        'prefix' => '',
        'strict' => true,
        'engine' => null,
    ],
    'second_mysql' => [
        'driver' => 'mysql',
        'host' => env('SECOND_DB_HOST', 'localhost'),
        'port' => env('SECOND_DB_PORT', '3306'),
        'database' => env('SECOND_DB_DATABASE', 'database'),
        'username' => env('SECOND_DB_USERNAME', 'username'),
        'password' => env('SECOND_DB_PASSWORD', 'password'),
        'charset' => 'utf8mb4',
        'collation' => 'utf8mb4_unicode_ci',
        'prefix' => '',
        'strict' => true,
        'engine' => null,
    ],
],

DB_CONNECTION=mysql
DB_HOST=127.0.0.1
DB_PORT=3306
DB_DATABASE=database
DB_USERNAME=username
DB_PASSWORD=password

SECOND_DB_CONNECTION=second_mysql
SECOND_DB_HOST=127.0.0.1
SECOND_DB_PORT=3306
SECOND_DB_DATABASE=second_database
SECOND_DB_USERNAME=second_username
SECOND_DB_PASSWORD=second_password

'guards' => [
    'web' => [
        'driver' => 'session',
        'provider' => 'users',
    ],
    // ...
],

'providers' => [
    'users' => [
        'driver' => 'eloquent',
        'model' => App\Models\User::class,
    ],
    'second_users' => [
        'driver' => 'eloquent',
        'model' => App\Models\SecondUser::class,
    ],
    // ...
],

use Illuminate\Support\Facades\Auth;

if (Auth::guard('web')->attempt($credentials)) {
    // 登录成功
} else {
    // 登录失败
}