Retrieves a transaction
{- "_id": "tran_Z-z3YK7iKQWSDeP2",
- "merchantId": "mcht_Z-z3YK7iKQWSDePz",
- "customerId": "cust_Z-z3YK7iKQWSDeP0",
- "merchantOrderId": "ordr_Z-z3YK7iKQWSDeP3",
- "transactionPayType": {
- "payCardId": "card_Z-z3Yq7iKQWSDeQO"
}, - "amount": 0,
- "currency": "AUD",
- "surchargeAmount": 0,
- "status": "accepted",
- "statusBeforeDispute": "accepted",
- "lastChargeId": "chrg_Z-z3YK7iKQWSDeP4",
- "refundedAmount": 0,
- "payoutId": "payout_Z-z3YK7iKQWSDeP_",
- "createdAt": "2019-08-24T14:15:22Z",
- "updatedAt": "2019-08-24T14:15:22Z",
- "fee": 0
}