The cancelChargeNow API command allows you to instruct TWCManager to stop charging under the ChargeNow policy, and revert to the existing policy.
The cancelChargeNow API command is not accompanied by any payload. You should send a blank payload when requesting this command.
An example of how to call this function via cURL is:
curl -X POST -d "" http://192.168.1.1:8080/api/cancelChargeNow