Update sequelize init condition

Author: Yukaii

lib/models/index.js

@@ -12,12 +12,11 @@ var logger = require("../logger.js");
 var dbconfig = config.db;
 dbconfig.logging = config.debug ? logger.info : false;
 
-var sequelize;
-if (typeof dbconfig.username === 'undefined' && typeof dbconfig.password === 'undefined') {
-    sequelize = new Sequelize(dbconfig.database, dbconfig);
-} else {
+var sequelize = null;
+if (dbconfig.hasOwnProperty('username') || dbconfig.hasOwnProperty('password'))
     sequelize = new Sequelize(dbconfig.database, dbconfig.username, dbconfig.password, dbconfig);
-}
+else
+    sequelize = new Sequelize(dbconfig.database, dbconfig);
 
 var db = {};