Message Chat with Amazon AWS Mobile Hub API and Delphi

I need a sample application that demonstrates how to integrate the Amazon AWS Mobile Hub API into Delphi Firemonkey. The application most be a chat message app, for Android, IOS, Windows and OSX. For this, I would like to use Amazon platforms such as AWS Mobile Hub, S3, DynamoDB with Embarcaredo Delphi etc. The application should have the following features: -Login via facebook / amazon or google account -Create a conversation topic -Delete a conversation topic -Subscribe to a topic -Unsubscribe from a topic -Post messages on subscribed topics -Receive new posts from the registered topic -Send images to S3 -Receive images of S3 -Send Push notification to subscribers on a certain topic (Google / Apple) -Send Push notification to a single user (Google / Apple) -Messages must be stored in DynamoDB organized by topics My goal is to learn how to integrate Delphi with Amazon's services by following the "Getting Started: Integrate Your AWS Mobile Hub Backend Features" publication at: [login to view URL] developerguide / [login to view URL]