public void setClientRequestToken(String clientRequestToken) {
        this.clientRequestToken = clientRequestToken;
    }
<p>
Idempotent token used to identify the request to <code>AssociateFaces</code>. If you use the same token with
multiple <code>AssociateFaces</code> requests, the same response is returned. Use ClientRequestToken to prevent
the same request from being processed more than once.
</p>

@param clientRequestToken
       Idempotent token used to identify the request to <code>AssociateFaces</code>. If you use the same token
       with multiple <code>AssociateFaces</code> requests, the same response is returned. Use ClientRequestToken
       to prevent the same request from being processed more than once.
aws-java-sdk-rekognition/src/main/java/com/amazonaws/services/rekognition/model/AssociateFacesRequest.java