title: Migrating from OneSignal to Firebase push notifications
body: <p>I have a large number of users subscribed to OneSignal. Is there a way to export all this data to firebase so I don't have to wait for the users to subscribe again.</p>
  
  <p>One Signal provides a similar functionality to import Users data from Parse and you could send push notifications to them.
  <a href="https://onesignal.com/parse" rel="noreferrer">https://onesignal.com/parse</a></p>