/// <summary>
        /// Main part of the program
        /// Create references to userDetail, loginLogic
        /// </summary>
        private static void ProgramMain()
        {
            UserDetails userDetails = new UserDetails();
            LoginLogic  loginLogic  = new LoginLogic();

            LoginSequence(userDetails, loginLogic);
        }
        /// <summary>
        /// Main log-in sequence
        /// </summary>
        /// <param name="userDetails">the instance of the userDetails class</param>
        /// <param name="loginLogic">the instance of the LoginLogic class</param>
        private static void LoginSequence(UserDetails userDetails, LoginLogic loginLogic)
        {
            bool doLogin;

            do
            {
                loginLogic.PasswordInput(userDetails, loginLogic.UsernameSelection(userDetails));
                doLogin = ProgramRedo();
                Console.WriteLine("\n");
            }while (doLogin);
        }