appfog 怎么用node连接自带的redis

文档没看懂

{"redis-2.2":[
    {
        "name":"redis-example",
        "label":"redis-2.2",
        "plan":"free",
        "tags":["redis","redis-2.2","key-value","nosql"],
        "credentials":{
            "hostname":"10.7.66.164",
            "host":"10.7.66.164",
            "port":5004,
            "password":"191dc43f-69a3-4d31-ac5e-4b66155b2e8e",
            "name":"9e3f3a9c-82ba-4c2e-bc83-b498e5447251"
        }
    }
]}

是不是要这样写

var options = {
    host: '10.7.66.164',
    hostname:'10.7.66.164',
    port: 5004,
    prefix: 'chs-sess',
    pass:这里怎么写?
    还有有这里貌似没有写name的选项
}
 app.use(express.cookieParser());
 app.use(express.session({ store: new RedisStore(options), secret: 'zclcat' }))

还有prefix有什么用