Added action button for login window

src/main/java/LoginGUI.java

@@ -6,6 +6,7 @@ import java.util.List;
 public class LoginGUI extends JFrame implements ActionListener {
     private JTextField usernameField;
     private JPasswordField passwordField;
+    private JButton loginButton;
 
     public LoginGUI() {
         setTitle("Login");
@@ -29,6 +30,11 @@ public class LoginGUI extends JFrame implements ActionListener {
         passwordField.setBounds(100, 50, 160, 25);
         add(passwordField);
         
+        loginButton = new JButton("Login");
+        loginButton.setBounds(100, 90, 100, 25);
+        loginButton.addActionListener(this);
+        add(loginButton);
+        
     }
 
     @Override