Retrieves a transaction
{- "_id": "tran_aEFHJ6FI6hobVEc5",
- "merchantId": "mcht_aEFHJ6FI6hobVEc2",
- "customerId": "cust_aEFHJ6FI6hobVEc3",
- "merchantOrderId": "ordr_aEFHJ6FI6hobVEc6",
- "transactionPayType": {
- "payCardId": "card_aEFHKqFI6hobVEdS"
}, - "amount": 0,
- "currency": "AUD",
- "surchargeAmount": 0,
- "status": "accepted",
- "statusBeforeDispute": "accepted",
- "lastChargeId": "chrg_aEFHJ6FI6hobVEc7",
- "refundedAmount": 0,
- "payoutId": "payout_aEFHKKFI6hobVEdC",
- "createdAt": "2019-08-24T14:15:22Z",
- "updatedAt": "2019-08-24T14:15:22Z",
- "fee": 0
}