public List <string> FetchTwitterFeed() { try { if (!System.IO.File.Exists(_userFilePath)) { return new List <string> { "Error: user.txt does not exist please upload" } } ; if (!System.IO.File.Exists(_tweetFilePath)) { return new List <string> { "Error: tweet.txt does not exist please upload" } } ; var userDictionary = _userService.BuildandRegisterUsers(_userFilePath, true); _tweetService.BuildTwitterFeed(_tweetFilePath, userDictionary); twitterFeed = _tweetService.RenderAllTwitterFeeds(userDictionary); return(twitterFeed); } catch (Exception ex) { return(new List <string> { $"Error! {ex.Message}" }); } }