🐛 Closing browser auth doesn't quit

 - Clicking close exits the application with code 1

Resolves oktadev#163

src/main/java/com/okta/tools/authentication/BrowserAuthentication.java

@@ -51,9 +51,9 @@ public static String login(OktaAwsCliEnvironment environment) throws Interrupted
  public void start(final Stage stage) throws IOException {
  stage.setWidth(802);
  stage.setHeight(650);
+ stage.setOnCloseRequest(event -> System.exit(1));
  Scene scene = new Scene(new Group());
 
-
  final WebView browser = new WebView();
  final WebEngine webEngine = browser.getEngine();