public void readOption() {

        int choice = 0;
        do {
            displayMainMenu();
            try {
                choice = sc.nextInt();
                sc.nextLine();
                System.out.println();
                switch (choice) {
                    case 1:
                        processViewStatistics();
                        break;
                    case 2:
                        processMyHangar();
                        //processStorage();
                        break;
                    case 3:
                        processShopping();
                        break;
                    case 4:
                        processPVP();
                        break;
                    case 5:
                        processLogout();
                        break;
                    default:
                        System.out.println("Invalid Input!");
                }
            } catch (InputMismatchException e) {
                // display error message
                System.out.println("Please enter a valid option!");
                sc.nextLine();
            }
        } while (choice != 5);
    }