public async Task <TweetResponseMessage> InsertTweetsByExpression(string expression, string filename)
        {
            var result = TwitterService.InsertTweetsByExpression(expression, filename);

            return(TweetsMapper.ToTweetsResponseMessage(result));
        }
        public async Task <TweetResponseMessage> GetTweetsByExpression(string expression)
        {
            var result = await TwitterService.GetTweetsByExpression(expression);

            return(TweetsMapper.ToTweetsResponseMessage(result));
        }