Как отсылать геолокацию на сервер в фоне?

Приложение запрашивает разрешение при закрытии на работу в фоне.
Сам код геолокации
DeviceLocationService

Code

import Combine
import CoreLocation

class DeviceLocationService: NSObject, CLLocationManagerDelegate, ObservableObject{
    var coordinatesPublisher = PassthroughSubject<CLLocationCoordinate2D, Error>()
    var deniedLocationAccessPublisher = PassthroughSubject<Void, Never>()
    var startTime: Date?
    private override init() {
        super.init()
    }
    static let shared = DeviceLocationService()
    private lazy var locationManager: CLLocationManager = {
        let manager = CLLocationManager()
        manager.desiredAccuracy = kCLLocationAccuracyBest
        manager.delegate = self
        return manager
    }()
    func requestLocationUpdates(){
        switch locationManager.authorizationStatus {
        case.notDetermined:
            locationManager.requestAlwaysAuthorization()
        case.authorizedAlways, .authorizedWhenInUse:
            locationManager.startUpdatingLocation()
        default:
            deniedLocationAccessPublisher.send()
        }
    }
    func locationManagerDidChangeAuthorization(_ manager: CLLocationManager) {
        switch manager.authorizationStatus{
        case .authorizedWhenInUse, .authorizedAlways:
            manager.startUpdatingLocation()
            
        default:
            manager.stopUpdatingLocation()
            deniedLocationAccessPublisher.send()
        }
    }
    
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        guard let location = locations.last else {return}
        coordinatesPublisher.send(location.coordinate)
        
    }
    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        coordinatesPublisher.send(completion: .failure(error))
    }
}

Как организовать сохранение сессии в WKWebView?

https://stackoverflow.com/a/53512299/19187009 данный код почему-то выдавал ошибку
"Thread 1: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value"