Key TTL

[tmaiaroto]

Add a time to live on keys. Upon getting the key (or possibly updating? unless another option is passed with the update to cancel the ttl), if the current time is beyond the expiration the key will be deleted and an empty response returned (with message about key not found).

TTLs can be updated and removed from keys at any point before the request for such key. Items in DynamoDB have no official way of expiring automatically so they are technically still there. It is the application that will expire.