payment/app/Model/User.php

<?php

declare(strict_types=1);

namespace App\Model;

class User extends Model
{
    protected $table = 'users';

    public static function getPlatformAccount($isAccountPay) {
        if ($isAccountPay) {
            return self::where('user_id', 'ACT_4')->first();
        }
        return self::where('is_platform_account', 1)->first();
    }
}