public async Task <ActionResult> Import([FromBody] List <Book> books)
        {
            var storedData = await _searchService.Search("*", new SearchSettings
            {
                From = 0,
                Size = 100
            });

            foreach (var item in storedData)
            {
                await _searchService.Delete(item.Id);
            }

            var results = new List <Book>();

            foreach (var book in books)
            {
                var result = await _searchService.AddOrUpdate(book);

                results.Add(result);
            }

            return(Ok(results));
        }