How to verify GCM sender ID of deviceToken in Parse.com
<p>We are using Parse.com to send push notifications. With the announced shutdown, we're now looking into how to migrate to another service. On Android, we haven't configured any GCM sender ID so we have been implicitly using Parse.com's sender ID. That's a problem for the migration (see <a href="https://onesignal.com/blog/important-note-for-android-parse-push-users/" rel="nofollow">Urgent note for Parse Android Push users</a> and <a href="https://parse.com/docs/server/guide#migrating" rel="nofollow">Migrating an Existing Parse App</a> (section <em>Exporting GCM Registration IDs</em>)).</p>

<p>Therefore, we are now preparing a new version of our Android app with our own GCM sender ID. Is there any way in Parse.com to verify which devices (<em>installation</em>) are associated with our sender ID? How can we check if our update was successful? Does Google provide any API for directly or indirectly checking if a sender ID works with our Google project?</p>

<p>Any tool or any approach that involves writing some code is ok.</p>