Correct way to retrieve token for FCM - iOS 10 Swift 3

Question

i had implement Firebase with FirebaseAuth/FCM etc and did sent notification successfully through Firebase Console.

However i would need to push the notification from m

Answer 1

To Get current FCM Token

if let token = Messaging.messaging().fcmToken {
    // token is current fcmToken
}

To Renew current FCM Token

If we delete current instanceId, new token will be received vi MessagingDelegate (messaging:didReceiveRegistrationToken) a moment later.

InstanceID.instanceID().deleteID { (error) in
    if let er = error {
        print(er.localizedDescription)
    } else {
        print("instanceID().deleteID  success ---------------➤")
    }
}