private static AuthConfig extractAuthConfigFromCredentialsHelper(Logger log, String registryToLookup, String credConfig) throws MojoExecutionException {
        CredentialHelperClient credentialHelper = new CredentialHelperClient(log, credConfig);
        String version = credentialHelper.getVersion();
        log.debug("AuthConfig: credentials from credential helper/store %s%s",
                  credentialHelper.getName(),
                  version != null ? " version " + version : "");
        return credentialHelper.getAuthConfig(registryToLookup);
    }
Try using the AWS credentials provided via ENV variables.
See https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-envvars.html
src/main/java/io/fabric8/maven/docker/util/AuthConfigFactory.java