fix session

@@ -31,9 +31,9 @@ module.exports = () => {
                     return this.uid;
                 },
                 uid: cookie.getUid(req),
-                session: req.cookies._SESSION,
+                sessionKey: req.cookies._SESSION,
                 isValid() {
-                    return this.uid && this.session;
+                    return this.uid && this.sessionKey;
                 }
             };
         }