code: def delete_order(self, order_id):
          
          payload = {
              "request": "/v1/order/cancel",
              "nonce": self._nonce,
              "order_id": order_id
          }
  
          signed_payload = self._sign_payload(payload)
          r = requests.post(self.URL + "/order/cancel", headers=signed_payload, verify=True)
          json_resp = r.json()
  
          try:
              json_resp['avg_execution_price']
          except:
              return json_resp['message']
  
          return json_resp
docs: Cancel an order.
          :param order_id:
          :return: