public void active(long gallery_id)
        {
            try
            {
                var gallery = _galleryRepository.getById(gallery_id);
                if (gallery == null)
                {
                    throw new ItemNotFoundException($"Gallery with id {gallery_id} doesnot exist.");
                }

                gallery.is_active = true;
                _galleryRepository.update(gallery);
            }
            catch (Exception)
            {
                throw;
            }
        }