You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: main.rs
    path of file: ./repos/tunet-rust/tunet-gui/src
    
    the code of the file until where you have to start completion: #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]

mod bind;
mod context;

use bind::{bind_about_model, bind_detai
    
async fn stop_model(model: &Mutex<Model>, del_at_exit: bool) -> Result<()> {
    let mut settings_reader = SettingsReader::new()?;
    if del_at_exit {
        let model = model.lock().await;
        settings_reader.delete(&model.username)?;
    }
    Ok(())
}