KT-MyPage/app/Http/Controllers/Web/Customer/ChangeEmailStartParams.php

<?php

namespace App\Http\Controllers\Web\Customer;

use App\Http\Controllers\Web\BaseParam;
use App\Http\Controllers\Web\Rule;

/**
 * @property string $newEmail
 */
class ChangeEmailStartParams extends BaseParam
{
    public function rules(): array
    {
        return [
            'new_email' => $this->str([...Rule::email()]),
        ];
    }
}