public KinesisInputDescriptor<StreamMessageType> withSecretKey(String secretKey) {
    this.secretKey = Optional.ofNullable(StringUtils.stripToNull(secretKey));
    return this;
  }
Kinesis secret key name for the system stream.
@param secretKey Kinesis secret key
@return this input descriptor
samza-aws/src/main/java/org/apache/samza/system/kinesis/descriptors/KinesisInputDescriptor.java