Added some validation logic for the username and password

src/main/java/ChatServer.java

@@ -4,7 +4,6 @@ import java.net.ServerSocket;
 import java.net.Socket;
 
 public class ChatServer {
-	// haha
 	private ServerSocket serverSocket;
 
 	public ChatServer(int port) {

src/main/java/SignUp.java

@@ -27,13 +27,20 @@ public class SignUp {
 
     // Function to create user
     public static SignUp createUser(String name, String password) {
-    // add validation logic here
-    return new SignUp(name, password);
+    	if (name == null || name.isEmpty()) {
+            throw new IllegalArgumentException("Username cannot be empty");
+        }
+        if (password == null || password.isEmpty()) {
+            throw new IllegalArgumentException("Password cannot be empty");
+        }
+        if (password.length() < 6) {
+            throw new IllegalArgumentException("Password must be at least 6 characters long");
+        }    return new SignUp(name, password);
     }
 
     public static void main(String[] args) {
         // Example 
-    SignUp user = createUser("JohnDoe", "password123");
+    SignUp user = createUser("TestUser", "TestPasswort");
 
     // Example of accessing properties
     System.out.println("User Name: " + user.getName());