static void Main(string[] args)
        {
            Receptionist receptionist = new Receptionist();
            bool         success      = false;

            while (!success)
            {
                success = receptionist.LogIn();
            }
            PatientApptManager patientApptManager = new PatientApptManager();

            bool endApp = false;

            while (!endApp)
            {
                DisplayOptions();
                string input = Console.ReadLine();
                switch (input)
                {
                case "1":
                    patientApptManager.AddNewPatientData();
                    break;

                case "2":
                    patientApptManager.MakeNewAppointment();
                    break;

                case "3":
                    patientApptManager.ManageAppointment();
                    break;

                case "4":
                    patientApptManager.ShowAppointmentDashboard();
                    break;

                case "5":
                    receptionist.ManageProfile();
                    break;

                case "6":
                    endApp = true;
                    break;

                default:
                    break;
                }
            }
        }