title: Autogenerate UUID for DynamoDB
body: <p>My use case is that I need to have UUID as primary key in one of my DynamoDB tables. I am using @DynamoDBAutoGeneratedKey for the same and I am able to use UUID. I also understand that the autogenerated key can be retrieved from the entity written to dynamo db just after storing it in dynamo db. But my concern is that is there any clean way to retrieve the auto generated key anywhere in the application or do I need to store the auto generated key in-memory ? Or should I implement secondary indexes to retrieve the autogenerated key ?</p>