如何从socket-io-redis获取redis商店客户端？(How do i get the redis store client from socket-io-redis?)

 socket-io-redis使用redis进行连接，我想知道如何从库中获取redis存储客户端，以便我可以使用该客户端在redis中存储键值对。 
 
var redis   = require('socket.io-redis');
var socketio = require('socket.io');

io = socketio.listen(app);    
io.adapter(redis({ host: 'localhost', port: 6379 }));
 
 我正在使用节点集群模型，所以我不想创建一个新的redis客户端，因为我已经有了。 

socket-io-redis use redis inside to connect, I wonder how can i get the redis store client from the library so that i can use that client to store key value pairs in redis.
 
var redis   = require('socket.io-redis');
var socketio = require('socket.io');

io = socketio.listen(app);    
io.adapter(redis({ host: 'localhost', port: 6379 }));
 
I am using node cluster model, So i do not want to create a new redis client as i already have one. 

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