clientRequestToken

A unique, client-generated idempotency token that, when provided in a request, ensures the request cannot be repeated with a changed parameter. If a request is received with the same parameters and a token is included, the request returns information about the initial request that used that token.

The Amazon Web ServicesSDKs prepopulate client request tokens. If you are using an Amazon Web ServicesSDK, an idempotency token is created for you.