Amplify secret() holding the FCM HTTP v1 credential — the full contents of
the Google service-account JSON downloaded from the Firebase console.
Resolved at deploy time and written to the GCM channel's ServiceJson with
DefaultAuthenticationMethod = TOKEN; never stored in the CloudFormation
template as plain text.
FCM (Firebase Cloud Messaging) / GCM channel configuration, using FCM HTTP v1 authentication. Google deprecated the legacy server-key (
ApiKey) API, so this models the current v1 path: a Google service-account JSON credential, supplied via an Amplifysecret(). Provide this to enable the GCM/FCM channel on the created End User Messaging (Pinpoint) application.Example