*
* @see AmazonS3Client#AmazonS3Client(AWSCredentials)
* @see AmazonS3Client#AmazonS3Client(AWSCredentials, ClientConfiguration)
*/
public AmazonS3Client() {
this(new AWSCredentialsProviderChain(
new EnvironmentVariableCredentialsProvider(),
new SystemPropertiesCredentialsProvider(),
new ProfileCredentialsProvider(),
new InstanceProfileCredentialsProvider()) {