public async Task <RatingDTO> AddRating(long companyId, RatingDTO rating)
        {
            if (companyId > 0 && rating != null)
            {
                var ratingDB = _companyMapper.ToRating(rating);
                var result   = await _statisticRepository.AddRating(companyId, ratingDB);

                var ratingDTO = _companyMapper.ToRatingDTO(result);

                return(ratingDTO);
            }
            return(null);
        }