当我成功登录时,没有问题我只是登录 . 但是当我输入错误的凭据时它会给我这个错误:

类型错误:传递给Illuminate \ Auth \ SessionGuard :: login()的参数1必须实现接口Illuminate \ Contracts \ Auth \ Authenticatable,null给定,在C:\ xampp \ htdocs \ project \ vendor \ laravel \ framework \ src中调用第294行\照亮\ Auth \ AuthManager.php

这是我的登录控制器:

<?php

namespace App\Http\Controllers\Auth;

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

class LoginController extends Controller
{
    /*
    |--------------------------------------------------------------------------
    | Login Controller
    |--------------------------------------------------------------------------
    |
    | This controller handles authenticating users for the application and
    | redirecting them to your home screen. The controller uses a trait
    | to conveniently provide its functionality to your applications.
    |
    */

    use AuthenticatesUsers;

    /**
     * Where to redirect users after login.
     *
     * @var string
     */
    protected $redirectTo = '/home';

    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        $this->middleware('guest', ['except' => 'logout']);
    }

    public function login()
    {
     $user = Account::where('email', request()->email)


           ->where('password',bcrypt(request()->password))
              ->first();
     Auth::login($user);
     return redirect('/');
 }
}

我的帐户(用户)模型:

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Auth\Authenticatable as AuthenticableTrait;

class Account extends Authenticatable
{
    use Notifiable;
    use AuthenticableTrait;
    public $timestamps = false;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [


 'username', 'email', 'password',
];

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

}

我究竟做错了什么?