//private Utility_class_UserDAOMSSQL<Utility_class_User> _currentUserBaseMSSQLDAO = new Utility_class_UserDAOMSSQL<Utility_class_User>();

        public bool TryUserLogin(string userName, string password, out LoginToken <T> token)
        {
            bool           isUserExists = false;
            LoginToken <T> loginToken   = null;
            //List<Utility_class_User> allTheusers = (_currentUserBaseMSSQLDAO as Utility_class_UserDAOMSSQL<Utility_class_User>).GetAll();
            List <Utility_class_User> allTheusers = _currentUtility_Class_UserDAOMSSQL.GetAll();

            Dictionary <string, Func <Utility_class_User, IPoco> > correlation = new Dictionary <string, Func <Utility_class_User, IPoco> >();

            correlation.Add(typeof(Administrator).Name, (utility_user) => { return(_currentAdministratorDAOMSSQL.GetAdministratorByUserID(utility_user.ID)); });
            correlation.Add(typeof(Customer).Name, (utility_user) => { return(_currentCustomerDAOMSSQL.GetCustomerByUserID(utility_user.ID)); });
            correlation.Add(typeof(AirlineCompany).Name, (utility_user) => { return(_currentAirlineDAOMSSQL.GerAirlineCompanyByUserID(utility_user.ID)); });
            foreach (var s in allTheusers)
            {
                string s_username = string.Empty;
                if (s.USER_NAME.Length < 50)
                {
                    s_username = s.USER_NAME;
                }
                else
                {
                    s_username = EncryptionProvider.Decryprt(s.USER_NAME);
                }
                if (userName == s_username)
                {
                    //isUserExists = true;
                    string s_password = string.Empty;
                    if (s.PASSWORD.Length < 50)
                    {
                        s_password = s.PASSWORD;
                    }
                    else
                    {
                        s_password = EncryptionProvider.Decryprt(s.PASSWORD);
                    }
                    if (password == s_password)
                    {
                        //var actualUser = correlation[s.USER_KIND](s);
                        isUserExists = correlation.TryGetValue(s.USER_KIND, out Func <Utility_class_User, IPoco> funcMethod);
                        var actualUser = funcMethod(s);
                        loginToken            = new LoginToken <T>();
                        loginToken.ActualUser = actualUser as T;
                        loginToken.UserAsUser = s;
                    }
                    else
                    {
                        throw new WrongPasswordException(password);
                    }
                }
            }
            if (!isUserExists)
            {
                throw new UserNotFoundException(userName);
            }
            token = loginToken;
            return(isUserExists);
        }