diff --git a/.env b/.env
index 3c81611..80b898a 100644
--- a/.env
+++ b/.env
@@ -1,3 +1,4 @@
+NODE_ENV=development
 MONGO_ACCOUNT=mongo_yNWy6K
 MONGO_PASSWORD=mongo_pPGmE3
 SESSION_SECRET=secret
diff --git a/common/constant/httpStatus.js b/common/constant/httpStatus.js
index bdad8fa..b0b01d3 100644
--- a/common/constant/httpStatus.js
+++ b/common/constant/httpStatus.js
@@ -67,4 +67,4 @@ const HTTP_STATUS = {
   GATEWAY_TIMEOUT: 504
 }
 
-module.exports = HTTP_STATUS
+module.exports = { HTTP_STATUS }
diff --git a/controllers/userController.js b/controllers/userController.js
index 7ddb7bb..2b2f80b 100644
--- a/controllers/userController.js
+++ b/controllers/userController.js
@@ -37,7 +37,7 @@ exports.createUser = [
     try {
       const user = req.body
       await userService.create_user(user)
-      return FetchResult.formatResult(res, HTTP_STATUS.CREATED, successMessages.user.created)
+      return FetchResult.formatResult(res, HTTP_STATUS.CREATED, messages.user.created)
     } catch (err) {
       logger('Error creating user: ', err)
       if (err.message === messages.user.already_exists) {
@@ -77,11 +77,14 @@ exports.login = [
 
       const user = await userService.login(account, password)
       req.session.user = user
-      return FetchResult.formatResult(res, 200, successMessages.user.login)
+      return FetchResult.formatResult(res, 200, messages.user.login)
     } catch (err) {
       if (err.message === messages.user.not_found) {
         return FetchResult.formatResult(res, 401, messages.user.account_password_not_match)
       }
+
+      logger('Error logging in: ', err)
+
       return FetchResult.formatResult(
         res,
         HTTP_STATUS.INTERNAL_SERVER_ERROR,
@@ -100,7 +103,7 @@ exports.getUserExist = async (req, res) => {
     if (!exist) {
       return FetchResult.formatResult(res, 404, messages.user.not_found)
     }
-    return FetchResult.formatResult(res, 200, successMessages.user.exist)
+    return FetchResult.formatResult(res, 200, messages.user.exist)
   } catch (err) {
     logger('Error checking user existence: ', err)
     return FetchResult.formatResult(res, HTTP_STATUS.INTERNAL_SERVER_ERROR, 'Internal server error')