Iyzipay\Model\Subscription\SubscriptionUpgrade Object
(
    [rawResult:Iyzipay\ApiResource:private] => {"status":401,"errorCode":"5","errorMessage":"Authentication failed!","systemTime":1731207439818,"locale":"tr"}
    [status:Iyzipay\IyzipayResource:private] => 401
    [errorCode:Iyzipay\IyzipayResource:private] => 5
    [errorMessage:Iyzipay\IyzipayResource:private] => Authentication failed!
    [errorGroup:Iyzipay\IyzipayResource:private] => 
    [locale:Iyzipay\IyzipayResource:private] => tr
    [systemTime:Iyzipay\IyzipayResource:private] => 1731207439818
    [conversationId:Iyzipay\IyzipayResource:private] => 
    [referenceCode:Iyzipay\Model\Subscription\SubscriptionUpgrade:private] => 
    [parentReferenceCode:Iyzipay\Model\Subscription\SubscriptionUpgrade:private] => 
    [pricingPlanReferenceCode:Iyzipay\Model\Subscription\SubscriptionUpgrade:private] => 
    [customerReferenceCode:Iyzipay\Model\Subscription\SubscriptionUpgrade:private] => 
    [subscriptionStatus:Iyzipay\Model\Subscription\SubscriptionUpgrade:private] => 
    [trialDays:Iyzipay\Model\Subscription\SubscriptionUpgrade:private] => 
    [trialStartDate:Iyzipay\Model\Subscription\SubscriptionUpgrade:private] => 
    [trialEndDate:Iyzipay\Model\Subscription\SubscriptionUpgrade:private] => 
    [createdDate:Iyzipay\Model\Subscription\SubscriptionUpgrade:private] => 
    [startDate:Iyzipay\Model\Subscription\SubscriptionUpgrade:private] => 
    [endDate:Iyzipay\Model\Subscription\SubscriptionUpgrade:private] => 
)