code: def on_post(self, req, resp):
          
          args = req.context["args"]
          value = args["value"] or dt.datetime.utcnow()
          if args["unit"] == "minutes":
              delta = dt.timedelta(minutes=args["addend"])
          else:
              delta = dt.timedelta(days=args["addend"])
          result = value + delta
          req.context["result"] = {"result": result.isoformat()}
docs: A datetime adder endpoint.