public DisassociateFacesRequest withUserId(String userId) {
        setUserId(userId);
        return this;
    }
<p>
ID for the existing UserID.
</p>

@param userId
       ID for the existing UserID.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-rekognition/src/main/java/com/amazonaws/services/rekognition/model/DisassociateFacesRequest.java