Why I can not execute code after `App new().run();` | Bevy | Page 1

here is my code, the code after I call app.run() will never reach.
can it be possible to change resource outside bevy system when bevy app is running, what I want to do is changing bevy app resource in the js side when it running in the browser.

fn main() {
    let mut app = BevyApp::new();
    // never reach
    info!("after run info");
    app.update_scroll_rate(10.0, 10.0);
}
pub struct BevyApp {
    scroll_rate: Arc<Mutex<ScrollRate>>,
}
impl BevyApp {
    pub fn new() -> BevyApp{
        let arc_resource = Arc::new(Mutex::new(ScrollRate::default()));
        App::new()
            .insert_resource(Arc::clone(&arc_resource))
            .run();
        BevyApp {
            scroll_rate: arc_resource,
        }
    }
    pub fn update_scroll_rate(&mut self, x: f32, y: f32) {
        let mut mgrc = self.scroll_rate.lock().unwrap();
        mgrc.x = x;
        mgrc.y = y;
    }
}

#Why I can not execute code after `App new().run();`