The triPOS gift/reload endpoint maps to the Express GiftCardReload endpoint.
The transactionAmount request field contains the amount of additional funds to be loaded
on the card. If approved, in the response, the approvedAmount will contain this value and
balanceAmount will contain the amount of funds now on the card. If the card is a StoreCard,
the storeCard field in the triPOS request must contain the Id and
Password. These will appear in the StoreCardID and StoreCardPassword
elements in the Express request.