diff --git a/controllers/AccountController.js b/controllers/AccountController.js
index 089f657..6df0be9 100644
--- a/controllers/AccountController.js
+++ b/controllers/AccountController.js
@@ -30,11 +30,11 @@ class AccountController {
 
       const document = new Account({ name: name, account_type: account_type });
       const account = await document.save();
-      if(!account) { throw { code: 500, message: "FAILED_CREATE_ACCOUNT", data: null, status: false } }
+      if(!account) { throw { code: 500, message: "Gagal Menambahkan data akun!", data: null, status: false } }
 
       return res.status(200).json({
         status: true,
-        message: "SUCCESS_CREATE_ACCOUNT",
+        message: "Berhasil menambahkan data akun!",
         data: account,
       })
     } catch (error) {
@@ -84,14 +84,12 @@ class AccountController {
         data: null
       });
 
-      // check if account has transaction
-
       const account = await Account.findByIdAndUpdate( { _id: id }, req.body, { new: true } )
-      if(!account) { throw { code: 500, message: "ACCOUNT_UPDATE_FAILED", data: null, status: false } }
+      if(!account) { throw { code: 500, message: "Gagal mengubah data akun!", data: null, status: false } }
 
       return res.status(200).json({
         status: true,
-        message: "ACCOUNT_UPDATE_SUCCESS",
+        message: "Berhasil mengubah data akun!",
         data: account,
       })
     } catch (error) {
@@ -116,14 +114,21 @@ class AccountController {
       });
 
       // check if account has transaction
-      
+      const accounts = await Account.findById(id);
+      if(accounts.length > 0) {
+        return res.status(500).json({
+          status: false,
+          message: "Gagal menghapus akun karena telah memiliki riwayat transaksi!",
+          data: null,
+        });
+      }
 
       const account = await Account.findOneAndDelete({ _id: id })
-      if(!account) { throw { code: 500, message: "ACCOUNT_DELETE_FAILED", data: null, status: false } }
+      if(!account) { throw { code: 500, message: "Gagal menghapus data akun!", data: null, status: false } }
 
       return res.status(200).json({
         status: true,
-        message: "ACCOUNT_DELETE_SUCCESS",
+        message: "Berhasil menghapus data akun!",
         data: account,
       })
     } catch (error) {
diff --git a/controllers/AuthController.js b/controllers/AuthController.js
index df969c4..d2a7aa4 100755
--- a/controllers/AuthController.js
+++ b/controllers/AuthController.js
@@ -26,16 +26,16 @@ class AuthController {
   async login(req, res) {
     try {
       const { email, password } = req.body
-      if(!email) { throw { code: 428, message: "EMAIL_IS_REQUIRED", data: null, status: false } }
-      if(!password) { throw { code: 428, message: "PASSWORD_IS_REQUIRED", data: null, status: false } }
+      if(!email) { throw { code: 428, message: "Email harap di isi!", data: null, status: false } }
+      if(!password) { throw { code: 428, message: "Password harap di isi!", data: null, status: false } }
 
       const user = await User.findOne({ email: email })
-      if(!user) { throw { code: 403, message: "USER_NOT_FOUND", data: null, status: false } }
+      if(!user) { throw { code: 403, message: "Pengguna tidak ditemukan", data: null, status: false } }
       
       const isMatch = bcrypt.compareSync(password, user.password)
-      if(!isMatch) { throw { code: 403, message: "WRONG_PASSWORD", data: null, status: false } }
+      if(!isMatch) { throw { code: 403, message: "Password yang anda masukkan salah!", data: null, status: false } }
 
-      if(user.status === 'inactive') { throw { code: 403, message: "INACTIVE_USER", data: null, status: false } }
+      if(user.status === 'inactive') { throw { code: 403, message: "Pengguna tidak aktif!", data: null, status: false } }
 
       const payload = { id: user.id, role: user.role }
       const accessToken = await generateAccessToken(payload)
@@ -46,7 +46,7 @@ class AuthController {
 
       return res.status(200).json({
         status: true,
-        message: "LOGIN_SUCCESS",
+        message: "Berhasil Login",
         data: {
           user: data,
           accessToken,
@@ -66,7 +66,7 @@ class AuthController {
   async refreshToken(req, res) {
     try {
       const { refreshToken } = req.body
-      if(!refreshToken) { throw { code: 428, message: "REFRESH_TOKEN_IS_REQUIRED", data: null, status: false } }
+      if(!refreshToken) { throw { code: 428, message: "Token diperlukan!", data: null, status: false } }
 
       const verify = jwt.verify(refreshToken, env.JWT_REFRESH_TOKEN_SECRET)
       const payload = { id: verify.id, role: verify.role }
@@ -75,14 +75,14 @@ class AuthController {
       const _refreshToken = await generateRefreshToken(payload)
       
       const user = await User.findOne({ _id: verify.id })
-      if(!user) { throw { code: 403, message: "USER_NOT_FOUND", data: null, status: false } }
+      if(!user) { throw { code: 403, message: "Pengguna tidak ditemukan", data: null, status: false } }
       
       let data = { ...user._doc }
       delete data.password
 
       return res.status(200).json({
         status: true,
-        message: "REFRESH_TOKEN_SUCCESS",
+        message: "Berhasil menyegarkan token",
         data: {
           user: data,
           accessToken,
@@ -93,9 +93,9 @@ class AuthController {
       if(!err.code) { err.code = 500 }
       
       if(err.message === "jwt expired") {
-        err.message = "REFRESH_TOKEN_EXPIRED"
+        err.message = "Token kadaluarsa"
       } else if(err.message === 'invalid signature' || err.message === 'invalid token') {
-        err.message = "REFRESH_TOKEN_INVALID"
+        err.message = "Token tidak valid"
       }
 
       return res.status(err.code).json({
diff --git a/controllers/TransactionController.js b/controllers/TransactionController.js
index 85b7b0a..cae124b 100644
--- a/controllers/TransactionController.js
+++ b/controllers/TransactionController.js
@@ -8,7 +8,7 @@ class TransactionController {
   async index(req, res) {
     try {
       const query = await TransactionService.generateQuerySearch(req);
-      if(!query.status) throw { code: query.code, message: "ERROR_QUERY_SEARCH", data: null, status: false }
+      if(!query.status) throw { code: query.code, message: "Query Pencarian Eror!", data: null, status: false }
       let result = Transaction.aggregate(query.aggregate);
 
       const transactions = await result;
diff --git a/controllers/TransactionLineController.js b/controllers/TransactionLineController.js
index c70ad53..dbdfb1a 100644
--- a/controllers/TransactionLineController.js
+++ b/controllers/TransactionLineController.js
@@ -9,7 +9,7 @@ class TransactionController {
   async index(req, res) {
     try {
       const query = await TransactionLineService.generateQuerySearch(req);
-      if(!query.status) throw { code: query.code, message: "ERROR_QUERY_SEARCH", data: null, status: false }
+      if(!query.status) throw { code: query.code, message: "Query Pencarian Eror!", data: null, status: false }
       let result = TransactionLine.aggregate(query.aggregate);
 
       const lines = await result;
diff --git a/controllers/UserController.js b/controllers/UserController.js
index bf47bba..c7cef4d 100755
--- a/controllers/UserController.js
+++ b/controllers/UserController.js
@@ -11,7 +11,7 @@ class UserController {
   async index(req, res) {
     try {
       const query = await UserService.generateQuerySearch(req)
-      if(!query.status) throw { code: query.code, message: "ERROR_QUERY_SEARCH", data: null, status: false }
+      if(!query.status) throw { code: query.code, message: "Query Pencarian Eror!", data: null, status: false }
       
       const users = await User.aggregate([
         { $match: query.query },
diff --git a/controllers/VendorController.js b/controllers/VendorController.js
index 58e2d13..9c1e3ac 100644
--- a/controllers/VendorController.js
+++ b/controllers/VendorController.js
@@ -112,6 +112,16 @@ class VendorController {
         data: null
       });
 
+      // check if account has transaction
+      const vendors = await Vendor.findById(id);
+      if(vendors.length > 0) {
+        return res.status(500).json({
+          status: false,
+          message: "Gagal menghapus Vendor karena telah memiliki riwayat transaksi!",
+          data: null,
+        });
+      }
+
       const vendor = await Vendor.findOneAndDelete({ _id: id })
       if(!vendor) { throw { code: 500, message: "VENDOR_DELETE_FAILED", data: null, status: false } }
 
diff --git a/controllers/XlsxController.js b/controllers/XlsxController.js
index fc202c8..d4f3677 100644
--- a/controllers/XlsxController.js
+++ b/controllers/XlsxController.js
@@ -1,9 +1,9 @@
 import { writeFileSync } from "node:fs";
 import { Workbook } from "xlsx-kaku";
 
-import Transaction from "../models/Transaction.js";
+import TransactionLine from "../models/TransactionLine.js";
 
-import TransactionService from '../services/TransactionService.js';
+import TransactionLineService from '../services/TransactionLineService.js';
 
 import { fDate } from '../libraries/formatTime.js';
 
@@ -11,11 +11,11 @@ class XlsxController {
   async export(req, res) {
     try {
       console.log(req.query)
-      const query = await TransactionService.generateQuerySearch(req);
+      const query = await TransactionLineService.generateQuerySearch(req);
       if(!query.status) throw { code: query.code, message: "ERROR_QUERY_SEARCH", data: null, status: false }
-      let result = Transaction.aggregate(query.aggregate);
+      let result = TransactionLine.aggregate(query.aggregate);
 
-      const transactions = await result;
+      const lines = await result;
       const wb = new Workbook();
       const ws = wb.addWorksheet("TRANSAKSI");
       
@@ -30,8 +30,8 @@ class XlsxController {
       let number = 0;
       let income = 0;
       let expense = 0;
-      transactions.map((transaction) => {
-        if(currentDate !== fDate(transaction.date)) {
+      lines.map((line) => {
+        if(currentDate !== fDate(line.date)) {
           if(row !== 3) {
             row += 1;
             ws.setCell(row, 0, { type: "string", value: "Total" });
@@ -43,9 +43,9 @@ class XlsxController {
           income = 0;
           expense = 0;
           row += 3;
-          currentDate = fDate(transaction.date);
+          currentDate = fDate(line.date);
 
-          ws.setCell(row, 0, { type: "string", value: `${fDate(transaction.date*1)}`, style: { alignment: {horizontal: "center", vertical: "center"} } });
+          ws.setCell(row, 0, { type: "string", value: `${fDate(line.date*1)}`, style: { alignment: {horizontal: "center", vertical: "center"} } });
           ws.setMergeCell({ ref: `A${row+1}:F${row+1}` })
           
           row += 1
@@ -59,15 +59,15 @@ class XlsxController {
         number += 1;
         row += 1;
 
-        income += transaction.debit;
-        expense += transaction.credit;
+        income += line.debit;
+        expense += line.credit;
         
         ws.setCell(row, 0, { type: "number", value: number });
-        ws.setCell(row, 1, { type: "string", value: transaction.label });
-        ws.setCell(row, 2, { type: "string", value: transaction.accountId?.name || '' });
-        ws.setCell(row, 3, { type: "string", value: transaction.vendorId?.name || '' });
-        ws.setCell(row, 4, { type: "number", value: transaction.debit, style: { alignment: {horizontal: "right", vertical: "center"} } });
-        ws.setCell(row, 5, { type: "number", value: transaction.credit, style: { alignment: {horizontal: "right", vertical: "center"} } });
+        ws.setCell(row, 1, { type: "string", value: line.label });
+        ws.setCell(row, 2, { type: "string", value: line.accountId?.name || '' });
+        ws.setCell(row, 3, { type: "string", value: line.vendorId?.name || '' });
+        ws.setCell(row, 4, { type: "number", value: line.debit, style: { alignment: {horizontal: "right", vertical: "center"} } });
+        ws.setCell(row, 5, { type: "number", value: line.credit, style: { alignment: {horizontal: "right", vertical: "center"} } });
       })
 
       row += 1;
diff --git a/middlewares/auth.js b/middlewares/auth.js
index 6f7a45b..2c58907 100755
--- a/middlewares/auth.js
+++ b/middlewares/auth.js
@@ -12,9 +12,9 @@ const auth = () => {
         jwt.verify(token, env.JWT_ACCESS_TOKEN_SECRET, (err, data) => {
           if ( err ) {
             if( err.name == 'TokenExpiredError' ) {
-              throw 'TOKEN_EXPIRED'
+              throw 'Token Kadaluarsa!'
             } else {
-              throw 'TOKEN_IS_NOT_VALID'
+              throw 'Token tidak Valid!'
             }
           } else {
             req.jwt = data
@@ -22,7 +22,7 @@ const auth = () => {
           }
         })
       } else {
-        throw 'TOKEN_REQUIRED'
+        throw 'Token dibutuhkan!'
       }
     } catch (error) {
       return res.status(401).json({