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Connect OneSignal to Rey after you have created your OneSignal app and configured at least one push platform.

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Find your OneSignal App ID

In OneSignal, open your app and go to Settings → Keys & IDs. Copy the OneSignal App ID. The App ID identifies your OneSignal app and is the only OneSignal credential Rey needs.
You do not need to enter a OneSignal REST API Key in Rey. Keep any REST API keys inside OneSignal or other secure server-side systems.

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Add the App ID in Rey

1

Open the OneSignal integration

In your Rey app, open App settings → Integrations → OneSignal.
2

Paste the App ID

Paste the value from OneSignal → Settings → Keys & IDs → OneSignal App ID into the App ID field.
3

Save the integration

Save your settings. Rey will initialize OneSignal in your native iOS and Android app builds.
4

Test on a device

Publish or install a native build, open it on a real device, allow notification permission when asked, and confirm the device appears in OneSignal’s audience.
Use the same OneSignal App ID for the iOS and Android versions of a Rey app when they share the same OneSignal project.