How to properly use AlarmManager in Android for delayed tasks and reminders?

Hello everyone! I'm a beginner in Kotlin and Android development. I'm writing a reminder app. I need the app to trigger at a specific time (for example, every day at 9:00) and show a notification. I found the `AlarmManager` class, but I can't figure out how to configure it properly. I tried this code: ```kotlin val alarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager val intent = Intent(this, ReminderReceiver::class.java) val pendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT) val calendar = Calendar.getInstance().apply { set(Calendar.HOUR_OF_DAY, 9) set(Calendar.MINUTE, 0) set(Calendar.SECOND, 0) } alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.timeInMillis, AlarmManager.INTERVAL_DAY, pendingI