Add methods to list coupons.

crucialwebstudio / chargify-sdk-php

Chargify SDK for PHP

Apache License 2.0

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Add methods to list coupons. #29

Closed JeffMatson closed 5 years ago

JeffMatson commented 5 years ago

Currently, the SDK doesn't have the ability to list available coupons. Added methods to the Coupon class to include the functionality.

It should but up to contribution standards and I tried to borrow patterns from other places, but if not, just let me know and I can make the necessary changes.

JeffMatson commented 5 years ago

Pushed this prematurely before running through unit tests. Will reopen later.