session change

@@ -3,7 +3,6 @@
 const md5 = require('md5');
 const uuid = require('uuid');
 const _ = require('lodash');
-const Fn = require('lodash/fp');
 
 const aes = require('./aes-pwd');
 const cache = global.yoho.cache;
@@ -36,7 +35,7 @@ const syncUserSession = (uid, req, res, sessionKey) => {
     }
 
     return Promise.all([userService.profile(uid), cartService.goodsCount(uid)]).spread((userInfo, count) => {
-        let salt = Fn.pipe(Fn.take(8), Fn.join(''))(uuid.v4());
+        let salt = uuid.v4().substring(0, 8);
         let saltedUid = uid + salt;
 
         let saltedToken = sign.makeToken(saltedUid);