List all the customers custom parcel types.
UserID - The ID of the user to get the contacts for (see List Users). If omitted, all types for all users will be returned.
A data structure like so:
{ 'result': [ { 'Packaging': 112, 'CustomerID': 142233, 'Description': 'Banana box', 'Weight': 2, 'PackedIn': 'Parcel' }, { 'Packaging': 142, 'CustomerID': 142233, 'Description': '6 Pack', 'Weight': 2, 'PackedIn': 'Parcel' }, ], 'generated_in': '62ms' }
https://au.api.fastway.org/v6/fastlabel/listcustomparceltypes?api_key=YOUR_API_KEY