用户登录后使用 socketio 时收到以下错误。我找到了可能解决这个问题的passport-socketio，但我不知道如何将它集成到sails.js。你知道任何代码示例吗？认为
error: TypeError: Object #<Object> has no method 'isAuthenticated'
at module.exports (/Users/peng/www/321bougez/api/policies/isAuthenticated.js:13:11)
at _bind.enhancedFn (/Users/peng/www/321bougez/node_modules/sails/lib/router/bind.js:375:4)
at callbacks (/Users/peng/www/321bougez/node_modules/sails/node_modules/express/lib/router/index.js:164:37)
at param (/Users/peng/www/321bougez/node_modules/sails/node_modules/express/lib/router/index.js:138:11)
at param (/Users/peng/www/321bougez/node_modules/sails/node_modules/express/lib/router/index.js:135:11)
at pass (/Users/peng/www/321bougez/node_modules/sails/node_modules/express/lib/router/index.js:145:5)
at nextRoute (/Users/peng/www/321bougez/node_modules/sails/node_modules/express/lib/router/index.js:100:7)
at callbacks (/Users/peng/www/321bougez/node_modules/sails/node_modules/express/lib/router/index.js:167:11)
at wrapperFn (/Users/peng/www/321bougez/node_modules/sails/lib/hooks/controllers/index.js:293:4)
at _bind.enhancedFn (/Users/peng/www/321bougez/node_modules/sails/lib/router/bind.js:375:4)