Usernotification framework badge does not increase

I am using userNotification framework in my app and I want to set the badge to the number of notification received so what I did was to set the number of notification received into a userdefaults then i tried to assign the value to the badge to get me a badge number but the badge number would not increase. This is my code below

To set value of received notification

center.getDeliveredNotifications { (notification) in

            UserDefaults.standard.set(notification.count, forKey: Constants.NOTIFICATION_COUNT)
            print("notification.count \(notification.count)")
            print(".count noti \(UserDefaults.standard.integer(forKey: Constants.NOTIFICATION_COUNT))")

        }

this accurately prints the number of notification recieved and when i decided to set it to my badge it only shows 1

content.badge = NSNumber(value: UserDefaults.standard.integer(forKey: Constants.NOTIFICATION_COUNT))

I have no idea why the value does not increase every time. any help would be appreciated.

or if it is possible to always update the badge anywhere in the app

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