Can't integrate refresh policy

Code Block // Request a timeline refresh after 2.5 hours.let date = Calendar.current.date(byAdding: .minute, value: 150, to: Date())let timeline = Timeline(entries: entries, policy: .after(date))completion(timeline)

Code Block struct Provider: IntentTimelineProvider {    let networkManager = NetworkManager()    func placeholder(in context: Context) -> SimpleEntry {        SimpleEntry(date: Date(), configuration: ConfigurationIntent(), clubnamehome: networkManager.clubNameHome)    } func getSnapshot(for configuration: ConfigurationIntent, in context: Context, completion: @escaping (SimpleEntry) -> ()) {        let entry = SimpleEntry(date: Date(), configuration: configuration, clubnamehome: networkManager.clubNameHome)        completion(entry)    }func getTimeline(for configuration: ConfigurationIntent, in context: Context, completion: @escaping (Timeline<Entry>) -> ()) {        var entries: [SimpleEntry] = []  // Generate a timeline consisting of five entries an hour apart, starting from the current date.        let currentDate = Date()  for hourOffset in 0 ..< 5 {            let entryDate = Calendar.current.date(byAdding: .hour, value: hourOffset, to: currentDate)!            let entry = SimpleEntry(date: entryDate, configuration: configuration, clubnamehome: networkManager.clubNameHome)            entries.append(entry)        }//wie oft geupdatet werden soll        let date = Calendar.current.date(byAdding: .minute, value: 15, to: Date())        let timeline = Timeline(entries: entries, policy: .after(date!))completion(timeline) }}