如何在Laravel 5.7中限制数据库的数据输入

class User extends Model
{
    protected $fillable = ['name', 'email', 'password'];
}

class User extends Model
{
    protected $guarded = ['id', 'created_at', 'updated_at'];
}

public function store(Request $request)
{
    $validatedData = $request->validate([
        'name' => 'required|string|max:255',
        'email' => 'required|string|email|max:255|unique:users',
        'password' => 'required|string|min:6|confirmed',
    ]);

    // 创建用户
    User::create($validatedData);

    // 其他操作...
}