public IHttpActionResult GetProduct(int buyerID, int bookID)
        {
            Review review = db.Reviews.Where(r => r.Book_Id == bookID && r.Buyer_Id == buyerID).FirstOrDefault();

            if (review == null)
            {
                return(Ok(review));
            }
            ReviewVM reviewVM = ConvertClass.ReviewToVM(review);

            return(Ok(reviewVM));
        }
        public IHttpActionResult GetReviews(int userID)
        {
            var reviews = db.Reviews.Where(r => r.Seller_Id == userID).OrderByDescending(r => r.Date).ToList();;

            if (reviews == null)
            {
                return(Ok(reviews));
            }
            List <ReviewVM> listOfReviews = new List <ReviewVM>();

            foreach (var item in reviews)
            {
                ReviewVM reviewVM = ConvertClass.ReviewToVM(item);
                listOfReviews.Add(reviewVM);
            }

            return(Ok(listOfReviews));
        }