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As far as I have searched, you can only send notifs by either mentioning registration token of specific user, or group together users by subscribing them to a topic is there a way to send notifications to ALL THE USERS? I want to send the notification from my node backend using the firebase admin api to the android app doing authentication using firebase.

Frank van Puffelen
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Shreyas Gupta
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    There is no API to send to all devices with an app. The typical approach is to subscribe the app to a "/announcements" topic on startup and then send to that. – Frank van Puffelen Jun 17 '20 at 15:01

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