get https://{FQDN}/v1/clients//transactions/
Retrieves the Transaction.
In circumstances where you fail to receive a transactionID from us, you can do a retrieve via referenceID. (Allowed only up to 24 hours after original request)
Upon getting an SC of 207 from Create Transaction wait 90 seconds and then preform a RetrieveTransaction.
Do not poll. Close the HTTP Connection; wait 90 seconds; then call RetrieveTransaction, using thetransactionID.