Added basic click functionality to login button

src/main/java/LoginGUI.java

@@ -39,7 +39,15 @@ public class LoginGUI extends JFrame implements ActionListener {
 
     @Override
     public void actionPerformed(ActionEvent e) {
+    	if (e.getSource() == loginButton) {
+            String username = usernameField.getText();
+            String password = new String(passwordField.getPassword());
 
+            	//Add login functionality
+                JOptionPane.showMessageDialog(this, "Login");
+                
+            
+        }
     }