public string Pull()
        {
            List <string> listRss = _manager.ReadFromUrl();

            if (listRss == null)
            {
                _logger.LogInformation("the list of RSS feeds is empty");
                return("The list of RSS feeds is empty!");
            }

            foreach (var rss in listRss)
            {
                try
                {
                    _manager.Download(rss);
                }
                catch (Exception e)
                {
                    _logger.LogError(e, "There was an error loading");
                }
            }
            return("Success!");
        }