Xcode – How To Update Data in Another View Controller without Segue (SideMenu)

I am using SideMenu and I am trying to add an item to that SideMenu from another View Controller.

I store the items for SideMenu in habits object. But I have no idea how to add a new item from ADD VIEW CONTROLLER as there is no segue.

To sum up;
How can I access/edit habits object in SideMenu from "Add View Controller"

Here is my code for SideMenu;

import UIKit
import SideMenu
import FSCalendar

class MenuListController: UITableViewController {
    
    var habits = [Habit]()
    var selectedHabitIndex = 0
        
    let darkColor = UIColor(red: 33/255.0, green: 33/255.0, blue: 33/255.0, alpha: 1)
    override func viewDidLoad() {
        super.viewDidLoad()

        tableView.reloadData()
        tableView.backgroundColor = darkColor
        tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cell")
        
        
        // MARK: - HABIT INITILIZAR
        var dateStrings = ["2020-12-25","2020-12-24","2020-12-23","2020-12-22"]
        var dateObjects = [Date]()
        let dateFormatter = DateFormatter()
        for date in dateStrings{
            dateFormatter.dateFormat = "yyyy-MM-dd"
            let dateObject = dateFormatter.date(from: date)
           dateObjects.append(dateObject!)
         }
        
        
        let formatter = DateFormatter()
        formatter.dateFormat = "yyyy/MM/dd"
        let someDate = formatter.date(from: "2020/12/29")
        
            
        habits = [Habit(name: "Read a book", selectedDatesArray: dateObjects),
                   Habit(name: "Go for a walk", selectedDatesArray: dateObjects)
        ]
    }
    
    
    // MARK: - Number of Habits in the Table View
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return habits.count
    }
    
    
    // MARK: - Display Names of the Habits in the Table View
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
        cell.textLabel?.text = habits[indexPath.row].name
        cell.textLabel?.textColor = .white
        cell.backgroundColor = darkColor
        return cell
    }
    
}

Main View Controller

import UIKit
import SideMenu
import FSCalendar

class ViewController: UIViewController, FSCalendarDelegate, FSCalendarDelegateAppearance {
    
    var selectedDateArray : [Date] = []
    var habits = [Habit]()
    
    
    
    var menu: SideMenuNavigationController?
    var selectedHabit: Habit?
    
    
    @IBOutlet weak var calendar: FSCalendar!
    
    var selectedDate = NSDate()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        calendar.delegate = self
        calendar.scrollDirection = .vertical
        calendar.allowsMultipleSelection = true
        calendar.locale = NSLocale(localeIdentifier: "tr") as Locale
        
        menu = SideMenuNavigationController(rootViewController: MenuListController())
        menu?.leftSide = true
        menu?.setNavigationBarHidden(true, animated: false)
        SideMenuManager.default.leftMenuNavigationController = menu
        SideMenuManager.default.addPanGestureToPresent(toView: self.view)
     
        
        var dateStrings = ["2020-12-25","2020-12-24","2020-12-23","2020-12-22"]
        var dateObjects = [Date]()
        let dateFormatter = DateFormatter()
        for date in dateStrings{
            dateFormatter.dateFormat = "yyyy-MM-dd"
            let dateObject = dateFormatter.date(from: date)
           dateObjects.append(dateObject!)
         }
        
            
        habits = [Habit(name: "Read a book", selectedDatesArray: dateObjects),
                   Habit(name: "Go for a walk", selectedDatesArray: dateObjects)
        ]
        
    }
    
    func toggleSideBar() {
        present(menu!, animated: true, completion: nil)
    }
    
    @IBAction func didMenuTapped(_ sender: UIButton) {
        present(menu!, animated: true, completion: nil)
    }
    
    func showSelectedDates (habit: Habit) {
        calendar.select(habit.selectedDatesArray)
    }
    
    func setTitle(habit: Habit) {
        title = habit.name
    }
    

   
    func calendar(_ calendar: FSCalendar, didSelect date: Date, at monthPosition: FSCalendarMonthPosition) {
        selectedDateArray.append(date)
    }
    
    func updateUI() {
    
        setTitle(habit: selectedHabit ?? habits[0] )
        showSelectedDates(habit: selectedHabit ?? habits[0])
        
    }
    
}
    

Add Habit View Controller

import UIKit

class AddHabitViewController: UIViewController, UITextFieldDelegate {

    @IBOutlet weak var textField: UITextField!
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
    }
    
    
    

    

    @IBAction func addbuttonTapped(_ sender: UIButton) {
        
        // NO IDEA WHAT TO PUT HERE?
        self.dismiss(animated: true, completion: nil)
        
    }
}