Matas Lauzadis updated the Kotlin S3 MRAP example in the shepazon/aws-doc-sdk-examples repository to use DefaultAwsSigner, replacing the previous CrtAwsSigner implementation. This change aligned the sample code with the latest AWS SDK authentication scheme, ensuring ongoing compatibility with evolving AWS security practices. By focusing on authentication and S3 integration using Kotlin and the AWS SDK, Matas improved the maintainability and reliability of the example, reducing future maintenance risk. The update also enhanced developer onboarding by providing up-to-date, best-practice code for working with S3 MRAP scenarios, though the scope was limited to a single feature this period.