经过长期研究，我找到了解决方案.我希望这可以帮助其他人.
我已自定义:id，用户名，密码，并记住表中的令牌以及文件User.php，LoginController.php.

After long research I have find my solution. I hope that this can help someone else.
I have customized: id, username, password and remember token in the table and the files User.php, LoginController.php.

表格:

CREATE TABLE `gf_users` (
  `gf_id` int(11) NOT NULL,
  `gf_name` text NOT NULL,
  `gf_email` varchar(200) NOT NULL,
  `gf_password` varchar(300) NOT NULL,
  `gf_remember_token` varchar(300) NOT NULL,
) 

web.php :

// Authentication Routes
Route::get('users', 'Auth\NewLoginController@showLoginFormUsers')->name('login');
Route::post('users', 'Auth\NewLoginController@checklogin');
Route::post('logout', 'Auth\NewLoginController@logout')->name('logout');
// Registration Routes
Route::get('users/registration', 'Auth\RegisterController@showRegistrationFormUsers')->name('register');
Route::post('users/registration', 'Auth\RegisterController@register');

NewLoginController.php :

<?php

namespace App\Http\Controllers\Auth;

use App\Http\Controllers\Controller;
use Illuminate\Foundation\Auth\AuthenticatesUsers;
use Illuminate\Support\Facades\Auth;
use Illuminate\Http\Request;

class LoginController extends Controller
{

    use AuthenticatesUsers;
    protected $redirectTo = '/users/details';

    public function __construct()
    {
        $this->middleware('guest')->except('logout');
    }


    public function showLoginFormUsers(){
        return view('users.login');
    }

    public function username(){
        return 'gf_email';
    }

    function checklogin(Request $request){

        $this->validate($request, [
            'input-email' => 'required', 
            'input-password' => 'required',
        ]);

        $user_data = array(
            'gf_email'  => $request->get('input-email'),
            'password' => $request->get('input-password')
        );

        if(!Auth::attempt($user_data)){
            return redirect('users');
        }

        if ( Auth::check() ) {
            return redirect('users/details');
        }
    }

    function logout(){
        Auth::logout();
        return redirect('users');
    }

}

NewUser.php :

<?php

namespace App;

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

class User extends Authenticatable
{
    use Notifiable;
    protected $table = 'gf_users';
    protected $primaryKey = 'gf_id';
    public $timestamps = false; 

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'gf_email', 'gf_password',
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'gf_password', 'gf_remember_token',
    ];

    /**
     * Get the password for the user.
     *
     * @return string
     */
    public function getAuthPassword(){
        return $this->gf_password;
    }

    /**
     * Get the token value for the "remember me" session.
     *
     * @return string
     */
    public function getRememberToken()
    {
        return $this->gf_remember_token;
    }

    /**
     * Set the token value for the "remember me" session.
     *
     * @param  string  $value
     * @return void
     */
    public function setRememberToken($value)
    {
        $this->gf_remember_token = $value;
    }

    /**
     * Get the column name for the "remember me" token.
     *
     * @return string
     */
    public function getRememberTokenName()
    {
        return 'gf_remember_token';
    }

    /**
     * Get the e-mail address where password reminders are sent.
     *
     * @return string
     */
    public function getReminderEmail()
    {
        return $this->gf_email;
    }
}

login.blade.php

<form method="POST" action="{{ asset('/users') }}">
@csrf
  <div class="form-group">
    <input type="email" class="form-control" name="input-email" id="input-email" placeholder="Email" required>
  </div>
  <div class="form-group">
    <input type="password" class="form-control" name="input-password" id="input-password" placeholder="Password" required>
  </div>
  <button type="submit" class="btn btn-primary">LOGIN</button>
</form>

config/auth.php :

<?php

return [


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


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

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

    ],

    'providers' => [
        'users' => [
            'driver' => 'eloquent',
            'model' => App\NewUser::class
        ],

        //'users' => [
        //     'driver' => 'database',
        //     'table' => 'users',
        // ],
    ],

    'passwords' => [
        'users' => [
            'provider' => 'users',
            'table' => 'password_resets',
            'expire' => 60,
        ],
    ],

];

更改后，我执行了命令 php artisan config:cache.