Get a refund with an UUID.
Basic authentication header of the form Basic <encoded-value>, where <encoded-value> is the base64-encoded string username:password.
UID of the refund
successful operation
Amount in cents
Status of the refund, a refund is a reversed payment
payment_holding, payment_pending, payment_failure, payment_success, payment_cancelled Reason for the refund
requested_by_customer, duplicate, fraudulent