public async Task <IActionResult> Index(string keyword, int pageIndex = 1, int pageSize = 10)
        {
            var request = new GetContactsPagingRequest()
            {
                Keyword   = keyword,
                PageIndex = pageIndex,
                PageSize  = pageSize,
            };
            var data = await _contactApiClient.GetPagings(request);

            ViewBag.Keyword = keyword;
            if (TempData["result"] != null)
            {
                ViewBag.SuccessMsg = TempData["result"];
            }
            return(View(data));
        }