These modules are required when deploying to a Silverstripe Cloud environment.
DynamoDB
This module enables storing PHP sessions across multiple servers. Failure to install this module may cause users to lose their session as they navigate your website and requests are routed to different servers.
composer require silverstripe/dynamodb --with-all-dependenciesAlternative versions can be found at packagist.org/silverstripe/dynamodb.
No further setup is required when deploying to a Silverstripe Cloud environment.