Problem with Firebase Firestore when calling on App Delegate swift

Question

I want to make a firestore call every time the app launches. but the line of accessing firestore or the completion is not being executed.

class MoodAnalysisFirestoreManager{

private let db = Firestore.firestore()
static let shared =  MoodAnalysisFirestoreManager()
private let currentUser =  AuthManager.shared().getCurrentUserSafe()!

private init(){}

  public func addNewDayToCloud(){
    
    let todayName = Date().getTodayName(date: Date()).uppercased()
    let safeDate = safeDateString(date: Date())

    let ref = db.collection("MoodAnalysis").document(currentUser)
    ref.collection("analysis").document(safeDate).setData([
        "day": todayName,
        "date": Date(),
        "neutralCount": 0,
        "angryCount": 0,
        "sadCount": 0,
        "happyCount": 0,
        "Count":0,
        "emotionVal":0
    ]){
        error in
        print(error)
    }
    
}

app delegate function

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    FirebaseApp.configure()
    let db = Firestore.firestore()
    print(db)
    MoodAnalysisFirestoreManager.shared.addNewDayToCloud()
    return true
}

if I called MoodAnalysisFirestoreManager.shared.addNewDayToCloud() from the app delegate it does not add anything to the firestore, but if I make any type of retrieving data from the cloud it works fine or, calls this function in other view controllers everything works fine.