How the subscription will be processed & How user will be charged for subscription ?

[PREScriptZ]

Hi there

May you explain purpose of this file https://github.com/iyzico/iyzipay-php/blob/master/samples/subscription-samples/create_subscription_with_customer_reference_code.php ?

I think it should create a subscription for user with existing reference code, right?

But in create customer file (https://github.com/iyzico/iyzipay-php/blob/master/samples/subscription-samples/create_customer.php), we do not have card details of user, how the subscription will be processed & how user will be charged for subscription?

Thanks