Amazon Simple Notification Service (Amazon SNS) now supports delivering mobile push notifications via Google Firebase’s HTTP V1 API. When creating a new platform application in the Amazon SNS console or API, you can choose token-based authentication to enable Amazon SNS to deliver mobile push notifications on your behalf, using the new Google FCM HTTP v1 API. You can also upgrade your existing platform application to use token-based authentication. Once you provide a valid key file, Amazon SNS will switch your application from the legacy FCM API to the new HTTP v1 API.
Source:: Amazon AWS