using this package app was not build in android or IOS both

[ps108developer]

`import UIKit
import Flutter
import workmanager
import flutter_background_service_ios

@UIApplicationMain

@objc class AppDelegate: FlutterAppDelegate {

override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    
    SwiftFlutterBackgroundServicePlugin.taskIdentifier = "your.custom.task.identifier"

    GeneratedPluginRegistrant.register(with: self)
    UNUserNotificationCenter.current().delegate = self

    WorkmanagerPlugin.setPluginRegistrantCallback { registry in
        GeneratedPluginRegistrant.register(with: registry)
    }

    WorkmanagerPlugin.registerBGProcessingTask(withIdentifier: "be.tramckrijte.workmanagerExample.taskId")
    WorkmanagerPlugin.registerBGProcessingTask(withIdentifier: "be.tramckrijte.workmanagerExample.rescheduledTask")
    WorkmanagerPlugin.registerBGProcessingTask(withIdentifier: "be.tramckrijte.workmanagerExample.simpleDelayedTask")
    WorkmanagerPlugin.registerBGProcessingTask(withIdentifier: "be.tramckrijte.workmanagerExample.iOSBackgroundProcessingTask")

    WorkmanagerPlugin.registerPeriodicTask(withIdentifier: "be.tramckrijte.workmanagerExample.iOSBackgroundAppRefresh", frequency: NSNumber(value: 20 * 60))

    return super.application(application, didFinishLaunchingWithOptions: launchOptions)

}

override func userNotificationCenter(
    _ center: UNUserNotificationCenter,
    willPresent notification: UNNotification,
    withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
    completionHandler(.alert)
 }

}
`

Errors ::

/Users/nikunj/Flutter Project.O/PrishuSoft/ZuguMobileAppLatest/zugu-ring/ios/Runner/AppDelegate.swift:23:27 Type 'WorkmanagerPlugin' has no member 'registerBGProcessingTask'

/Users/nikunj/Flutter Project.O/PrishuSoft/ZuguMobileAppLatest/zugu-ring/ios/Runner/AppDelegate.swift:24:27 Type 'WorkmanagerPlugin' has no member 'registerBGProcessingTask'

/Users/nikunj/Flutter Project.O/PrishuSoft/ZuguMobileAppLatest/zugu-ring/ios/Runner/AppDelegate.swift:25:27 Type 'WorkmanagerPlugin' has no member 'registerBGProcessingTask'

/Users/nikunj/Flutter Project.O/PrishuSoft/ZuguMobileAppLatest/zugu-ring/ios/Runner/AppDelegate.swift:26:27 Type 'WorkmanagerPlugin' has no member 'registerBGProcessingTask'

/Users/nikunj/Flutter Project.O/PrishuSoft/ZuguMobileAppLatest/zugu-ring/ios/Runner/AppDelegate.swift:28:27 Type 'WorkmanagerPlugin' has no member 'registerPeriodicTask'