public List<CouponUserInfo> GetCouponUserDetails(int offset, System.Nullable<int> limit, string couponCode, string userName, System.Nullable<int> couponStatusId, string validFrom, string validTo, int storeId, int portalId, string cultureName)
 {
     try
     {
         CouponManageSQLProvider cmSQLProvider = new CouponManageSQLProvider();
         return cmSQLProvider.GetCouponUserDetails(offset, limit, couponCode, userName, couponStatusId, validFrom, validTo, storeId, portalId, cultureName);
     }
     catch (Exception ex)
     {
         throw ex;
     }
 }