message: a valid review-id is a string, not a number
diff: @@ -2,7 +2,7 @@ module.exports = function productReviews () {
  return (req, res, next) => {
  const user = security.authenticatedUsers.from(req)
  - if (typeof req.body.id !== 'number') {
  + if (typeof req.body.id !== 'string') {
  res.status(400).send()
  return
  }
  