diff --git a/src/controllers/adminController.ts b/src/controllers/adminController.ts
index b169f9e..0ba6044 100644
--- a/src/controllers/adminController.ts
+++ b/src/controllers/adminController.ts
@@ -1,6 +1,9 @@
 import { Request, Response } from "express";
 import { User } from "../models/user";
-import { ADMIN_MAX_USERS_PER_PAGE } from "../utils/utils";
+import {
+  ADMIN_MAX_USERS_PER_PAGE,
+  MONGODB_IGNORED_FIELDS,
+} from "../utils/constants";
 
 export async function GetAllUsers(req: Request, res: Response) {
   try {
@@ -21,7 +24,7 @@ export async function GetAllUsers(req: Request, res: Response) {
     // Query for the current page with limit and skip
     const users = await User.find({})
       .lean()
-      .select("-password -_id -__v") // Exclude password and other fields
+      .select(MONGODB_IGNORED_FIELDS) // Exclude password and other fields
       .skip(skip)
       .limit(pageSize);
 
diff --git a/src/controllers/userController.ts b/src/controllers/userController.ts
index f17eefe..a71b1d6 100644
--- a/src/controllers/userController.ts
+++ b/src/controllers/userController.ts
@@ -2,6 +2,7 @@ import { Request, Response } from "express";
 import bcrypt from "bcrypt";
 import { User } from "../models/user";
 import { saveSession } from "../utils/utils";
+import { MONGODB_IGNORED_FIELDS } from "../utils/constants";
 
 export async function SignUp(req: Request, res: Response) {
   if (!req.body.accountName || !req.body.username || !req.body.password) {
@@ -10,7 +11,9 @@ export async function SignUp(req: Request, res: Response) {
 
   const { accountName, username, password } = req.body;
 
-  const existingUser = await User.findOne({ accountName }).lean();
+  const existingUser = await User.findOne({ accountName })
+    .select("accountName -_id")
+    .lean();
 
   if (existingUser) {
     return res.status(400).json({ status: 1 });
@@ -89,7 +92,9 @@ export async function GetUserProfile(req: Request, res: Response) {
   try {
     const user = await User.findOne({
       accountName: req.params.accountName,
-    }).lean();
+    })
+      .select(MONGODB_IGNORED_FIELDS)
+      .lean();
 
     if (!user) {
       return res.status(404).json({ status: "err" });
diff --git a/src/utils/constants.ts b/src/utils/constants.ts
index 2461843..dc849c8 100644
--- a/src/utils/constants.ts
+++ b/src/utils/constants.ts
@@ -3,3 +3,5 @@ export const DEFAULT_SESSION_EXPIRATION: number = 7 * 24 * 60 * 60 * 1000;
 
 // Maximum number of users to display per page in the admin interface
 export const ADMIN_MAX_USERS_PER_PAGE: number = 10;
+
+export const MONGODB_IGNORED_FIELDS: string = "-password -_id -__v";