title: Custom sound push notification does not work (Flutter)
body: <pre><code>{
    "to": "XXXX",
    "notification": {
      "title": "ASAP Alert",
      "body": "Please open your app"
    },
    "data": {
      "screen": "/Nexpage1",
      "sound": "alarm",
      "click_action": "FLUTTER_NOTIFICATION_CLICK"
    }
  }
  </code></pre>
  
  <p>Above is my payload for the push notification. I have insert the alarm.mp3 file inside the raw folder, however it still does not give me the alarm sound, i have try for alarm.mp3 also, is there anything wrong with the json? of it because of the code on my dart file?</p>
  
  <p><a href="https://i.stack.imgur.com/X96Nf.png" rel="noreferrer"><img src="https://i.stack.imgur.com/X96Nf.png" alt="here&#39;s the mp3 file inside the raw file"></a></p>