saveGridTradeOrder = async (logger, key, order) => {
  logger.info({ key, order }, 'The grid trade order has been saved.');

  return mongo.upsertOne(
    logger,
    'trailing-trade-grid-trade-orders',
    { key },
    { key, order }
  );
}
Save grid trade order
@param {*} logger
@param {*} key
@param {*} order
@returns