// Use UIApplication's shared object `application`
PushManager.shared.set(pushFor: application) { (isGranted, token, error) in
    if error == nil {
        //Error while registering device            
        print("Error :- \(String(describing: error?.localizedDescription))")
        return
    }
    print("Device Token :- \(String(describing: token!)) and Permission :- \(String(describing: isgranted!))")
}

if let token = PushManager.shared.deviceToken {
    print(token)
}

let permition = PushManager.shared.isPermitionGranted
print("Push notification :\(permition)")

// You can subscribe at any place using....
PushManager.shared.manager.subscribe { notificationData in
    print("Notification Data - \(notificationData)")
}