public ActionResult <Quote> AddQuote(Quote quoteToAdd)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            // instead of accepting a new id from the user, generate our own GUID
            //quoteToAdd.Id = Guid.NewGuid();

            _context.AddQuote(quoteToAdd);

            return(CreatedAtAction(nameof(GetQuote), new { id = quoteToAdd.Id }, quoteToAdd));
        }