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)
 }
}