<security-domain name="myDomain" cache-type="default">
                    <authentication>
                        <login-module name="myauth" code="Simple" flag="optional"/>
                        <login-module name="myauth2" code="SimpleUsers" flag="sufficient">
                            <module-option name="foo" value="bar"/>
                            <module-option name="one" value="two"/>
                        </login-module>
                    </authentication>
                </security-domain>

[standalone@localhost:9990 /] /subsystem=security/security-domain=myDomain/authentication=classic/login-module=myauth:read-resource(recursive=true)
{
    "outcome" => "success",
    "result" => {
        "code" => "Simple",
        "flag" => "optional",
        "module" => undefined,
        "module-options" => undefined
    }
}