swiftui coredata widgetkit how to retrieve data - core-data

Question

I'm quite new on using CoreData in a widget. I'm adding widget to an app that use CoreData and I would like to retrieve data for widget too. I have created the AppGroup and shared the core data model with widget target also.
I'm trying to do the following but with no success
struct DictaWordWidget: Widget {
let kind: String = "DictaWordWidget"
var persistentContainer: NSPersistentContainer = {
let container = NSPersistentContainer(name: "DictaWord")
container.loadPersistentStores(completionHandler: { (storeDescription, error) in
if let error = error as NSError? {
fatalError("Unresolved error \(error), \(error.userInfo)")
}
})
container.viewContext.automaticallyMergesChangesFromParent = true
container.viewContext.mergePolicy = NSMergeByPropertyStoreTrumpMergePolicy
return container
}()
var body: some WidgetConfiguration {
StaticConfiguration(kind: kind, provider: Provider(context: persistentContainer.viewContext)) { entry in
WidgetView(entry: entry)
}
.supportedFamilies([.systemMedium, .systemLarge])
.configurationDisplayName("My Widget")
.description("This is an example widget.")
}
}
now the provider should have access to the container
so in provider I do
struct Provider: TimelineProvider {
var managedObjectContext : NSManagedObjectContext
typealias Entry = SimpleEntry
init(context : NSManagedObjectContext) {
self.managedObjectContext = context
}
at the end in the getTimeline
func getTimeline(in context: Context, completion: #escaping (Timeline<Entry>) -> ()) {
let request = NSFetchRequest<WordEntity>(entityName: "WordEntity")
do {
let words = try managedObjectContext.fetch(request)
let oneWord = Array(words.prefix(1))
let entry = SimpleEntry(date: .now, words: oneWord)
print("ee: \(words)")
let timeline = Timeline(entries: [entry], policy: .after(.now.advanced(by: 60 * 60 * 30)))
completion(timeline)
} catch let error {
print("Error fetching coredata words: \(error.localizedDescription)")
}
}
but unfortunately when is printed the words array it is empty but I have no error