diff --git a/LapTrinhMang_FTPSimulator/src/components/ListenThread.java b/LapTrinhMang_FTPSimulator/src/components/ListenThread.java
index c8af984..24ac3d9 100644
--- a/LapTrinhMang_FTPSimulator/src/components/ListenThread.java
+++ b/LapTrinhMang_FTPSimulator/src/components/ListenThread.java
@@ -430,7 +430,10 @@ public void run() {
                             System.out.println("Client[port " + getSocket().getPort() + "] said: " + message);
                             Files filesInfo = (Files) request.getObject();
                             FileEvent fileEvent = (FileEvent) request.getFileUpload();
+
                             new FileBLL().insertNewFile(filesInfo);
+
+                            // convert byte sang file -> lại file lưu trên server
                             saveFile(fileEvent);
                             break;
                         }
@@ -602,6 +605,16 @@ public void run() {
                         }
                         // </editor-fold>
 
+                        // <editor-fold defaultstate="collapsed" desc="FETCH_USERS">
+                        case "FETCH_USERS": {
+                            System.out.println("Client[port " + getSocket().getPort() + "] said: " + message);
+                            String authenEmail = (String) request.getObject();
+                            List<Users> listUsers = new UserBLL().getAllUser();
+                            response("fetch_users_success", new HandleResult(listUsers));
+                            break;
+                        }
+                        // </editor-fold>
+
                         default: {
                             System.out.println("Client[port " + getSocket().getPort() + "] said default: " + message);
                             response("test", "test");
diff --git a/LapTrinhMang_FTPSimulator/src/components/Server.java b/LapTrinhMang_FTPSimulator/src/components/Server.java
index 9c883f6..aadab31 100644
--- a/LapTrinhMang_FTPSimulator/src/components/Server.java
+++ b/LapTrinhMang_FTPSimulator/src/components/Server.java
@@ -43,6 +43,7 @@ public class Server {
 //        }
 //    }
     // </editor-fold>
+    
     private static ExecutorService executor;
     private static ServerSocket serverSocket;
     private static int port;
@@ -59,8 +60,9 @@ public static void Start() {
             System.out.println("Server is waiting for client on port " + port
                     + "...");
 
-            executor = Executors.newFixedThreadPool(10);
+            executor = Executors.newFixedThreadPool(100);    // giới hạn 10 client
             executor.execute(new ServerUI());
+            
             listenClientConnect();
         } catch (IOException ex) {
             System.err.println("Server socket xảy ra lỗi khi khởi tạo" + ex);
@@ -92,10 +94,12 @@ private static void listenClientConnect() {
 //------------------- DANH SÁCH CLIENT CONNECT TỚI SERVER ----------------
     public static void registerClient(ListenThread listenThread) {
         list_Client.add(listenThread);
+        System.out.println("Total client connect: " + list_Client.size());
     }
 
     public static void removeClientDisconnect(ListenThread listenThread) {
         list_Client.remove(listenThread);
+        System.out.println("Total client connect: " + list_Client.size());
     }
 
     public static ArrayList<ListenThread> getListClient() {
diff --git a/LapTrinhMang_FTPSimulator/src/middlewares/HandleVerify.java b/LapTrinhMang_FTPSimulator/src/middlewares/HandleVerify.java
index 41d36ba..34b5afb 100644
--- a/LapTrinhMang_FTPSimulator/src/middlewares/HandleVerify.java
+++ b/LapTrinhMang_FTPSimulator/src/middlewares/HandleVerify.java
@@ -38,6 +38,7 @@ public static HandleResult verifyRegisterUser(Users user) {
                             if (!existedEmail(user.getEmail())) {
                                 int verifyCode = ThreadRandoms.generateCode(); // random ra 1 verify code
                                 try {
+                                    // 1. mã code , 2. MailSender
                                     new SendMail(verifyCode, new MailSender(user.getEmail()));
                                     return new HandleResult(true, "Một mã xác thực vừa được gửi đến email của bạn!!!", verifyCode);
                                 } catch (Exception ex) {
@@ -50,7 +51,7 @@ public static HandleResult verifyRegisterUser(Users user) {
                     }
                     return new HandleResult(false, "Họ và tên không được bỏ trống!!!");
                 }
-                return new HandleResult(false, "Tối thiểu tám ký tự.\nÍt nhất một chữ cái , một số, một ký tự in hoa, một ký tự đặc biệt (nếu có)!!!");
+                return new HandleResult(false, "Tối thiểu 8 ký tự.\nÍt nhất một chữ cái , một số, một ký tự in hoa, một ký tự đặc biệt (nếu có)!!!");
             }
             return new HandleResult(false, "Không được phép sử dụng email có tiền tố là anonymous!!!");
         }
diff --git a/LapTrinhMang_FTPSimulator/src/models/HandleResult.java b/LapTrinhMang_FTPSimulator/src/models/HandleResult.java
index d8d55f0..702df9f 100644
--- a/LapTrinhMang_FTPSimulator/src/models/HandleResult.java
+++ b/LapTrinhMang_FTPSimulator/src/models/HandleResult.java
@@ -27,12 +27,13 @@ public class HandleResult implements Serializable {
     private List<Permissions> ListPermissionses;
     private List<FileShares> ListFileShared;
     private List<FolderShares> ListFolderShared;
+    private List<Users> ListUsers;
 
     @SuppressWarnings("unchecked")
     // <editor-fold defaultstate="collapsed" desc="Dùng cho authenticate">
     // 4 tham số: IsSuccessed - Message - User - Folder
     public HandleResult(boolean IsSuccessed, String Message, Users User,
-            Folders Folder) {
+                        Folders Folder) {
         this.IsSuccessed = IsSuccessed;
         this.Message = Message;
         this.User = User;
@@ -47,8 +48,8 @@ public HandleResult(List<Folders> ListFolderChild, List<Files> ListFile) {
 
     // 3 tham số: ListFileShareses - ListFolderShareses - ListPermissionses
     public HandleResult(List<FileShares> ListFileShared, List<FolderShares> ListFolderShared,
-            List<Files> ListFileShareses, List<Folders> ListFolderShareses,
-            List<Permissions> ListPermissionses) {
+                        List<Files> ListFileShareses, List<Folders> ListFolderShareses,
+                        List<Permissions> ListPermissionses) {
         this.ListFileShared = ListFileShared;
         this.ListFolderShared = ListFolderShared;
         this.ListFileShareses = ListFileShareses;
@@ -80,6 +81,11 @@ public HandleResult(boolean IsSuccessed, String Message) {
     public HandleResult(boolean IsSuccessed) {
         this.IsSuccessed = IsSuccessed;
     }
+    
+    // fetch Users
+    public HandleResult(List<Users> listUsers){
+        this.ListUsers = listUsers;
+    }
 
     @SuppressWarnings("unchecked")
     // <editor-fold defaultstate="collapsed" desc="Set - Get methods">
@@ -88,6 +94,14 @@ public List<Permissions> getListPermissionses() {
         return ListPermissionses;
     }
 
+    public List<Users> getListUsers() {
+        return ListUsers;
+    }
+
+    public void setListUsers(List<Users> ListUsers) {
+        this.ListUsers = ListUsers;
+    }
+
     public List<FileShares> getListFileShared() {
         return ListFileShared;
     }