title: FCM iOS send push notification to a topic to killed app
body: <p>I have an iOS app that uses FCM to do push notifications. In the app I subscribe to FCM topic. While app is running in the in the background, I am able to send and receive push notifications:</p>
  
  <pre><code>{
      "to": "/topics/mytopic",
      "notification": {
          "title": "Title",
          "body": "Body"
      },
      "content_available": true
  }
  </code></pre>
  
  <p>If I kill the application, push notifications are not delivered. However, I am still able to receive push notifications that are sent from the Firebase Console using "User segment".</p>
  
  <p>Is there a way to send push notifications to a topic when iOS app is killed?</p>