can publish onGroup

authhook/auth_on_publish.js

 var config = require('config');
 // https://github.com/isaacs/node-lru-cache
-var LRU = require("lru-cache") ,
+var LRU = require("lru-cache"),
     cache = LRU({
-                max: 500,
-                maxAge: 1000 * 60 * 5
-                });
+        max: 500,
+        maxAge: 1000 * 60 * 5
+    });
 
 // for testing
 function authCheck(client_id, username, topic, callback) {
     callback(true);
 }
 
-module.exports = function(options={}) {
-    return function(req, res, next) {
+module.exports = function (options = {}) {
+    return function (req, res, next) {
 
         if (req.header('vernemq-hook') == 'auth_on_publish' && req && req.body) {
             if (options.debug) {
@@ -23,24 +23,36 @@ module.exports = function(options={}) {
             var authstatus;
             var topic = req.body.topic;
 
-            var cachekey = 'pub:'+req.body.client_id +':'+ req.body.username+':'+topic;
+            var cachekey = 'pub:' + req.body.client_id + ':' + req.body.username + ':' + topic;
             var authstatus = cache.get(cachekey);
 
-            if (typeof(authstatus)=='undefined') {
-                // cache missed
-                authCheck(req.body.client_id, req.body.username, topic, function(result) {
-                    cache.set(cachekey, result);
-                    res.send({
-                        "result": result?"ok":"no"
+            // Set Response
+            var getGroupID = require('./utils/getGroupID').getGroupID
+            getGroupID(req.body.username, req.body.client_id, (_id) => { // get groupID
+                // console.log(_id)
+                var _ftopic = require('./utils/getTopic').getTopic(topic, _id) // get topic where concat with groupID
+                var response = {
+                    'result': 'ok',
+                    'modifiers': {
+                        'topic': _ftopic,
+                        'qos': 0,
+                        'retain': false
+                    }
+                }
+                console.log(response)
+
+                if (typeof (authstatus) == 'undefined') {
+                    // cache missed
+                    authCheck(req.body.client_id, req.body.username, topic, function (result) {
+                        cache.set(cachekey, result);
+                        res.send(response);
                     });
-                });
-            }
-            else {
-                res.send({
-                    "result": authstatus?"ok":"no"
-                });
-            }
-            next();
+                }
+                else {
+                    res.send(response);
+                }
+                next();
+            })
         }
         else {
             res.send({