func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        // .requestLocation will only pass one location to the locations array
        // hence we can access it by taking the first element of the array
        if let location = locations.first {
            self.latitudeLabel.text = "\(location.coordinate.latitude)"
            self.longitudeLabel.text = "\(location.coordinate.longitude)"
        }
    }