Retrieves a transaction via it's paid merchant order
{- "_id": "tran_aQMC3W4PfnlYjTDX",
- "merchantId": "mcht_aQMC3G4PfnlYjTDU",
- "customerId": "cust_aQMC3G4PfnlYjTDV",
- "merchantOrderId": "ordr_aQMC3W4PfnlYjTDY",
- "transactionPayType": {
- "payCardId": "card_aQMC4G4PfnlYjTDw"
}, - "amount": 0,
- "currency": "AUD",
- "surchargeAmount": 0,
- "status": "accepted",
- "statusBeforeDispute": "accepted",
- "lastChargeId": "chrg_aQMC3W4PfnlYjTDZ",
- "refundedAmount": 0,
- "payoutId": "payout_aQMC3W4PfnlYjTDg",
- "createdAt": "2019-08-24T14:15:22Z",
- "updatedAt": "2019-08-24T14:15:22Z",
- "fee": 0
}