Are you referring to activating your car in the app: if this is the case you create a user ID and use the VIN. The user ID if I remember correctly is plugged into your car’s profile in settings (you also need a Google account). For you to track your car, you would probably need an Air Tag or similar technology. I’m unaware of Volvo’s ability to track or disable the car if stolen. You might want to check with the dealer and report back if that’s a yes.