%% Modules
    {modules, [
        %% Client presence management module.
        %% Publish messages when client connected or disconnected
        {presence, [{qos, 0}]},
        %% Subscribe topics automatically when client connected
        {subscription, [
            %% $c will be replaced by clientid
            %% {"$queue/clients/$c", 1},
            {"$c/w", 1}
            %% Static subscriptions from backend
            %%backend
        ]}
        %% Rewrite rules
        %% {rewrite, [{file, "etc/rewrite.config"}]}
    ]},