added a textfield for password to signup GUI

src/main/java/SignUpGUI.java

@@ -4,7 +4,7 @@ import java.awt.event.ActionListener;
 import java.util.UUID;
 
 public class SignUpGUI extends JFrame implements ActionListener {
-	private JTextField usernameField;
+	private JTextField usernameField, passwordField;
 
     public SignUpGUI() {
         setTitle("Sign Up");
@@ -19,6 +19,14 @@ public class SignUpGUI extends JFrame implements ActionListener {
         usernameField = new JTextField();
         usernameField.setBounds(100, 20, 160, 25);
         add(usernameField);
+        
+        JLabel passwordLabel = new JLabel("Password:");
+        passwordLabel.setBounds(20, 50, 80, 25);
+        add(passwordLabel);
+
+        passwordField = new JPasswordField();
+        passwordField.setBounds(100, 50, 160, 25);
+        add(passwordField);
     }
 
     @Override