In Chapter 6, Securing Resources with Bucket Policies and IAM, you not only learned how to secure your buckets or objects using bucket policies and user policies but also how to manage common operations for an S3 bucket with AWS SDKs, which we came across in Chapter 1, Managing Common Operations with AWS SDKs . In the real world, for example, when you make your applications, you will need to use methods in the library or SDK to simplify using AWS services in your application. We will follow how to use AWS SDKs to make requests using the IAM user's temporary credentials with AWS SDKs.