Produces a list of delivery suburbs based on the specified delivery RF.
rfCode - The delivery RF code. See List Regional Franchises
A data structure like so:
{ 'result': [ { Town: ABBOTSTOWN, Postcode: DUBLIN, label: ABBOTSTOWN, DUBLIN }, { Town: ABBOTSTOWN, Postcode: DUBLIN, label: ABBOTSTOWN, DUBLIN } ] }
https://au.api.fastway.org/v6/psc/suburbsinregion/DUB?api_key=YOUR_API_KEY