server.setUsername("jason");
        server.setPassword("abc123");
        Xpp3Dom configuration = new Xpp3Dom("configuration");
        Xpp3Dom wagonProvider = new Xpp3Dom("wagonProvider");
        wagonProvider.setValue("httpclient");
        configuration.addChild(wagonProvider);
        server.setConfiguration(configuration);

        MavenExecutionRequest request = new DefaultMavenExecutionRequest();

            if (server.getConfiguration() != null) {
                XmlNode dom = server.getDelegate().getConfiguration();
                List<XmlNode> children = dom.children().stream()
                        .filter(c -> !"wagonProvider".equals(c.name()))
                        .collect(Collectors.toList());
                dom = XmlNode.newInstance(dom.name(), children);