public async Task UpdateAsync(int statisticId, UsedDaysStatistic obj)
        {
            var res = await _repository.FindAsync(statisticId);

            res.NumberDaysUsed = obj.NumberDaysUsed;
            await _repository.UpdateAsync(res);
        }
 public async Task AddAsync(UsedDaysStatistic obj)
 {
     await _repository.CreateAsync(obj);
 }