public function setUp()
{
$configuration = new Configuration();
$configuration->setMerchantId('MY_MERCHANT_01')->setSecretKey('SECRET_KEY')->setPaymentEndpointUrl('https://secure.payu.com.tr/order/alu/v3')->setLoyaltyInquiryEndPointUrl('https://secure.payu.com.tr/api/loyalty-points/check');
$this->configuration = $configuration;
$this->client = new Client($configuration);
}