Cannot declare class App\User, because the name is already in use 错误

跟教程 5.5. 创建用户对象《L01 Laravel 教程 - Web 开发实战入门 ( Laravel 5.7 )... 这里出错：

>>> App\Models\User::create(['name'=> 'Summer', 'email'=>'summer@example.com','password'=>bcrypt('password')])

User.php代码如下：

<?php

namespace App\Models;

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

class User extends Authenticatable
{
    use Notifiable;

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

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