HTTP REQUEST
             Note: The endpoint can be called by either a GET or POST request.
            At least one of the optional parameters must be passed as a json string:
        
| Field | Description | Example | 
|---|---|---|
| Province | (optional) | Western Cape | 
| Postal | (optional) | 7806 | 
| City | (optional) | Cape Town | 
| Suburb | (optional) | Constantiavale | 
| GroupName | identifier from winfreight | Wintest |