Android: FCM Setup (v1)

In your Firebase Project, click on the top left gear button and select 'Project Settings'.

At 'Cloud Messaging' tab, enable 'Cloud Messaging API (V1)' and check your Sender ID

If disabled, click the right 3-dot button and enable it.

At 'Service accounts' tab, generate your private key.

At FlareLane Channels > App Push > Push Certificate > FCM input fields, enter the Sender ID and upload your Service Account JSON file obtained above.