public IActionResult ViewShortUrl(string hash)
        {
            var urlRepo = new ShortenedUrlsRepository(_connectionString);
            var url     = urlRepo.GetByHash(hash);

            if (url == null)
            {
                return(Redirect("/"));
            }
            urlRepo.AddView(url.Id);
            return(Redirect(url.OriginalUrl));
        }