使用多使用者登入可能遇到Argument 1 passed to Illuminate\Auth\EloquentUserProvider::validateCredentia...的錯誤，那麼，如何實現多使用者登入呢？

首先，進入/config/auth.php

<?php

return [

    /*
    |--------------------------------------------------------------------------
    | Authentication Defaults
    |--------------------------------------------------------------------------
    |
    | This option controls the default authentication "guard" and password
    | reset options for your application. You may change these defaults
    | as required, but they're a perfect start for most applications.
    |
    */

    'defaults' => [
        'guard' => 'web', //預設的Auth方式
        'passwords' => 'users',
    ],

    /*
    |--------------------------------------------------------------------------
    | Authentication Guards
    |--------------------------------------------------------------------------
    |
    | Next, you may define every authentication guard for your application.
    | Of course, a great default configuration has been defined for you
    | here which uses session storage and the Eloquent user provider.
    |
    | All authentication drivers have a user provider. This defines how the
    | users are actually retrieved out of your database or other storage
    | mechanisms used by this application to persist your user's data.
    |
    | Supported: "session", "token"
    |
    */

    'guards' => [
        'web' => [ //預設的Auth方式
            'driver' => 'session',
            'provider' => 'users', //提供者，在下面設定
        ],
        'admin' => [
            'driver' => 'session',
            'provider' => 'admins',
        ],
        'add' => [ //這裡是要增加的登入方式名稱
            'driver' => 'session', //使用session來控制登入，登出
            'provider' => 'add', //使用的提供者名稱
        ],
    ],

    /*
    |--------------------------------------------------------------------------
    | User Providers
    |--------------------------------------------------------------------------
    |
    | All authentication drivers have a user provider. This defines how the
    | users are actually retrieved out of your database or other storage
    | mechanisms used by this application to persist your user's data.
    |
    | If you have multiple user tables or models you may configure multiple
    | sources which represent each model / table. These sources may then
    | be assigned to any extra authentication guards you have defined.
    |
    | Supported: "database", "eloquent"
    |
    */

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

         'add' => [
             'driver' => 'eloquent', //這裡用database或者eloquent,建議使用eloquent
             'table' => 'App\Add::class', //用database的話，用表名，用eloquent的話，用App\Add::class
         ],
    ],

    /*
    |--------------------------------------------------------------------------
    | Resetting Passwords
    |--------------------------------------------------------------------------
    |
    | Here you may set the options for resetting passwords including the view
    | that is your password reset e-mail. You may also set the name of the
    | table that maintains all of the reset tokens for your application.
    |
    | You may specify multiple password reset configurations if you have more
    | than one user table or model in the application and you want to have
    | separate password reset settings based on the specific user types.
    |
    | The expire time is the number of minutes that the reset token should be
    | considered valid. This security feature keeps tokens short-lived so
    | they have less time to be guessed. You may change this as needed.
    |
    */

    'passwords' => [
        'users' => [
            'provider' => 'users',
            'email' => 'auth.emails.password',
            'table' => 'password_resets',
            'expire' => 60,
        ],
    ],

];
 

相對應的，我們使用php artisan make:model Add，來建立一個model

<?php

namespace App;

// use Illuminate\Database\Eloquent\Model; //注意這裡要改變，因為我們用的是Auth的
use Illuminate\Foundation\Auth\User as Authenticatable;

class Daili extends Authenticatable //繼承從Model改成 Auth這個
{
    protected $table = 'adds'; //表名
    protected $fillable = [
        'name','mobile','password'
    ];
    protected $hidden = [
        'password'
    ];
}
 

可以了，大功告成，以後使用Auth::guard("add")就可以使用我們新新增的角色驗證了！