code: def create(payment, **data):
          
          if isinstance(payment, resources.Payment):
              payment = payment.id
  
          http_client = HttpClient()
          response, _ = http_client.post(routes.url(routes.REFUND_RESOURCE, payment_id=payment), data)
          return resources.Refund(**response)
docs: Create a refund on a payment.
  
          :param payment: Either the payment object or the payment id you want to refund.
          :type payment: resources.Payment|string
          :param data: data required to create the refund
  
          :return: The refund resource
          :rtype resources.Refund