问主线程上的SwiftUI强制等待

EN

    func verify() {
        if self.email != "" && self.pass != "" {
            Auth.auth().signIn(withEmail: self.email, password: self.pass) {
                (res, err) in
                if err != nil {
                    print(err!.localizedDescription)
                    self.error = err!.localizedDescription
                    self.alert.toggle()
                    return
                }
                print("success")
                //getVIN, finds a number from a database in Firestore, with the users email, and uploads
                //it to UserDefault
                self.getVIN(email: self.email)
                    UserDefaults.standard.set(true, forKey: "status")
                    UserDefaults.standard.set(self.email, forKey: "email")
                    print(UserDefaults.standard.string(forKey: "email"))
                //when i am finished i get sent to a new View with this function
                //the new View uses the cached email, but the getVIN-function is not finished until after i am redirected to the new page.
                    NotificationCenter.default.post(name: NSNotification.Name("status"), object: nil)
            }
        }
        else {
            self.error = "The information is wrong"
            self.alert.toggle()
        }
    }