public async Task <IActionResult> GetAsync(string username, string stringDate)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState.GetErrorMessages()));
            }

            var result = await _diaryEntryService.GetDiaryEntryAsync(username, stringDate);

            if (!result.Success)
            {
                return(BadRequest(result.Message));
            }

            var diaryEntryResource = _mapper.Map <DiaryEntry, DiaryEntryResource>(result.DiaryEntry);

            return(Ok(diaryEntryResource));
        }