private async void getRestrauntCoupons()
        {
            await GetCouponsRequest.SendGetCouponsRequest();

            for (int i = 0; i < RealmManager.All <CouponsList>().First().Coupons.Count(); i++)
            {
                if (RealmManager.All <CouponsList>().First().Coupons[i].couponType == "Restaurant")
                {
                    coupons.Add(new Coupon(RealmManager.All <CouponsList>().First().Coupons[i]));
                }
            }
        }
        public async Task RefreshCouponList()
        {
            var validGetCouponRequest = await GetCouponsRequest.SendGetCouponsRequest();

            uxPromotionListView.ItemsSource = RealmManager.All <CouponList>().FirstOrDefault().coupons.ToList();
        }