nodejs在控制台上报了如下错误，求解？？？

$ node app
F:\movie\app.js:49
store: new mongoStore({
^^^^^
SyntaxError: Unexpected identifier
at exports.runInThisContext (vm.js:73:16)
at Module._compile (module.js:443:25)
at Object.Module._extensions..js (module.js:478:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Function.Module.runMain (module.js:501:10)
at startup (node.js:129:16)
at node.js:814:3

    这是报错部分的代码：

    app.use(session({

secret: 'imovie',
resave: false,
saveUninitialized: true
store: new mongoStore({
url: dbUrl,
collection: 'sessions'
})
}))

语法错误，意外的标识符；
是不是缺少mongoStore的引用？

是不是不支持参数：url

var MongoStore = require(‘connect-mongo’)(session);

 store: new MongoStore({
db: settings.db,
host: settings.host,
port: settings.port
})

 var MongoClient = require(‘mongodb’).MongoClient
, assert = require(‘assert’);

var url = '’;//数据库地址
// Use connect method to connect to the Server
MongoClient.connect(url, function(err, db) {

assert.equal(null, err);
console.log(“Connected correctly to server”);

db.close();
});