How to add array using CoreData

The following code is just a blank coreData set. I just want to add a string array to this current code.

import UIKit
import CoreData

class ViewController: UIViewController {
@IBOutlet var txt: UITextField!

@IBAction func submit(_ sender: Any) {

            let appdeleaget = UIApplication.shared.delegate as! AppDelegate
            let context = appdeleaget.persistentContainer.viewContext
            let NewUser = NSEntityDescription.insertNewObject(forEntityName: "Users", into: context)

            do {

            catch {


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