in src/main/java/com/amazonaws/neptune/auth/NeptuneApacheHttpSigV4Signer.java [81:86]
public NeptuneApacheHttpSigV4Signer(final String regionName,
final AWSCredentialsProvider v1AwsCredentialProvider,
final String serviceName) throws NeptuneSigV4SignerException {
super(regionName, v1AwsCredentialProvider, serviceName);
}