get https://de1.api.central.arubanetworks.com/network-monitoring/v1alpha1/gateways//wan-tunnels//aggregated-usage
This API retrieves bandwidth usage (in bytes) of the provided gateway WAN tunnel. The data will be fetched based on the timestamp range provided in the filter. If no timestamp range is specified in the filter, data for the last 3 hours will be returned by default. Here 'null' represents no data.