onetime.kt

 private fun scheduleTask() {
        // build an object of OneTimeWorkRequestBuilder
        val workerRequest = OneTimeWorkRequestBuilder<NotificationRequestWorker>()
            .setInitialDelay(20, TimeUnit.SECONDS)
            .build()
        // Enqueue the above workrequest object to the WorkManager
        WorkManager.getInstance(this).enqueue(workerRequest)
    }