// PhoneNum Check
        public bool phoneNumCheck(string phoneNum)
        {
            if (stringCheck(phoneNum, 3))
            {
                print.phoneNumLengthOverMessage();
                return(true);
            }
            if (sd.selectForExists("member", "PhoneNumber", phoneNum))
            {
                print.existsPhoneNumMessage();
                return(true);
            }

            return(false);
        }