/// <summary>
        /// Finds all  Refresh Token data with refresh Token String containing specified keyword
        /// </summary>
        /// <param name="refreshTokenString"> Refresh Token String</param>
        /// <returns>The result of the operation</returns>
        public OperationResult FindByRefreshTokenString(string refreshTokenString)
        {
            IFindRefreshTokenRepository repository = (IFindRefreshTokenRepository)RepositoryFactory.Create(Keywords.FindRefreshToken);

            try
            {
                List <RefreshToken> res = repository.FindByRefreshTokenString(refreshTokenString);
                return(new OperationResult(true, res));
            }
            catch (Exception e)
            {
                return(new OperationResult(false, e));
            }
        }
        /// <summary>
        /// Finds all  Refresh Token data with expired Date1, expired Date2 containing specified keyword
        /// </summary>
        /// <param name="expiredDate1"> Expired Date</param>
        /// <param name="expiredDate2"> Expired Date</param>
        /// <returns>The result of the operation</returns>
        public OperationResult FindByExpiredDateBetween(DateTime expiredDate1, DateTime expiredDate2)
        {
            IFindRefreshTokenRepository repository = (IFindRefreshTokenRepository)RepositoryFactory.Create(Keywords.FindRefreshToken);

            try
            {
                List <RefreshToken> res = repository.FindByExpiredDateBetween(expiredDate1, expiredDate2);
                return(new OperationResult(true, res));
            }
            catch (Exception e)
            {
                return(new OperationResult(false, e));
            }
        }