Register a label number to receive automatic updates when new scan events are processed
Notification options are;
labelno - Label number to receive updates for 
            pushmethod - The method on which updates are sent. Available options are 
{
            'result': {
            'inserted': false,
            'exists': true
    },
    'generated_in': '45ms'}
    https://au.api.fastway.org/v5/tracktrace/pushnotification_register/3a0000253492/url/all?api_key=YOUR_API_KEY