Firebase Refresh Token

Question

Using the method

[FIRInstanceID tokenWithAuthorizedEntity:scope:options:handler]

Im not quite sure what the parameters are calling for? What is

Answer 1

Version for Swift (based on @HeadOnn's answer):

func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data)
{
    Messaging.messaging().setAPNSToken(deviceToken, type: .prod) // may be excess

    guard let plistPath = Bundle.main.path(forResource: "GoogleService-Info", ofType: "plist"),
        let options = FirebaseOptions(contentsOfFile: plistPath)
    else { return }

    InstanceID.instanceID().token(withAuthorizedEntity: options.gcmSenderID, 
            scope: InstanceIDScopeFirebaseMessaging,
            options: ["apns_token": deviceToken])
    { (token, error) in
        // handle token and error
    }
}