added initialize subscription support

iyzico / iyzipay-python

iyzipay api python client

MIT License

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added initialize subscription support #66

Closed fyilmazz closed 3 years ago

fyilmazz commented 4 years ago

I added support for Subscription Initialize. Please review and let me know what you think!

Note: Sample code does not work for test API. I believe there is no support for this feature in the test API. However, it is tested for production API.