diff --git a/back/models/vn-user.js b/back/models/vn-user.js
index b9b20efe5..29c51509d 100644
--- a/back/models/vn-user.js
+++ b/back/models/vn-user.js
@@ -139,7 +139,7 @@ module.exports = function(Self) {
         }
     };
 
-    Self.validateLogin = async function(user, password, ctx = null) {
+    Self.validateLogin = async function(user, password, ctx) {
         const loginInfo = Object.assign({password}, Self.userUses(user));
         const token = await Self.login(loginInfo, 'user');