The handling of credentials could be improved. Instead of directly providing the keys in the plugin configuration.

Use the DefaultAWSCredentialsProviderChain

This means that you can use the .aws/credentials shared with the aws command line tool from Amazon. Really userfriendly. Perhaps it should be explicitly turned on by referring directly to a AWS configuration profile name in a property.

Standard maven credential handling

it is possible to use the standard credential handling in Maven. For example in settings.xml you can write something like

<server>
            <id>aws.amazon.com</id>
            <username>XXXYYYACCESS_KEYKLFJKELw</username>
            <password>jkshfdakjlsdfSECRET_KEYlkdjslkfds</password>
</server>

and have a property where you can refer to the server definition id.