login window appears but does nothing

src/main/java/rocks/zipcode/atm/CashMachineApp.java

@@ -27,9 +27,14 @@ public class CashMachineApp extends Application {
 
     private TextField field = new TextField();
     private CashMachine cashMachine = new CashMachine(new Bank());
+    GridPane grid;
 
-    public void login(Stage primaryStage){
-        GridPane grid = new GridPane();
+    Stage primaryStage = new Stage();
+    Scene scene1 = new Scene(login(primaryStage),400,200);
+    Scene scene2 = new Scene(createContent(), 500, 500);
+
+    public Parent login(Stage primaryStage){
+        grid = new GridPane();
         grid.setAlignment(Pos.CENTER);
         grid.setHgap(10);
         grid.setVgap(10);
@@ -41,28 +46,18 @@ public class CashMachineApp extends Application {
         hbButton.getChildren().add(btn);
         grid.add(hbButton,1,4);
 
-        final Text actiontarget = new Text();
-        grid.add(actiontarget,1,6);
-
-        btn.setOnAction(new EventHandler<ActionEvent>() {
-            @Override
-            public void handle(ActionEvent event) {
-                createContent();
-
-            }
-        });
-
-
-        Scene scene = new Scene(grid, 300, 275);
-        primaryStage.setScene(scene);
+        //btn.setOnAction(e->primaryStage.setScene(scene2));
+        primaryStage.setScene(scene1);
         primaryStage.setTitle("Welcome to Zip Cloud Bank");
         Label userID = new Label("User I.D.");
         grid.add(userID,0,1);
         TextField userTextField = new TextField();
         grid.add(userTextField,1,1);
+        btn.setOnAction(e->primaryStage.setScene(scene2));
+       return grid;
     }
 
-    private Parent createContent() {
+    public Parent createContent() {
         VBox vbox = new VBox(10);
         vbox.setPrefSize(600, 600);
 
@@ -110,8 +105,11 @@ public class CashMachineApp extends Application {
     }
 
     @Override
-    public void start(Stage stage) throws Exception {
-        stage.setScene(new Scene(createContent()));
+    public void start(Stage stage){
+        this.primaryStage = stage;
+        stage.setTitle("Zip Cloud Bank");
+        stage.setScene(scene1);
+        stage.isResizable();
         stage.show();
     }