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/leptos/examples/login_with_token_csr_only/server/src
    
    the code of the file until where you have to start completion: use api_boundary as json;
use axum::{
    extract::State,
    http::Method,
    response::Json,
    routing::{get, post},
    Router,
};
use axum_extra::TypedHeader;
use headers::{authorization::Bearer, Authorization};
use parking_lot::RwLock;
use std::{env, net::SocketAddr, sync::Arc};
use tokio::net::TcpListener;
use tower_http::cors::{Any, CorsLayer};

mod adapters;
mod application;

use self::application::*;

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    if let Err(err) = env::var("RUST_LOG") {
        match err {
            env::VarError::NotPresent => {
                env::set_var("RUST_LOG", "debug");
            }
            env::VarError::NotUnicode(_) => {
                return Err(anyhow::anyhow!(
                    "The value of 'RUST_LOG' does not contain valid unicode \
                     data."
                ));
            }
        }
    }
    env_logger::init();

    let shared_state = Arc::new(RwLock::new(AppState::default()));

    let cors_layer = CorsLayer::new()
        .allow_meth
    
async fn main() -> anyhow::Result<()> {
    if let Err(err) = env::var("RUST_LOG") {
        match err {
            env::VarError::NotPresent => {
                env::set_var("RUST_LOG", "debug");
            }
            env::VarError::NotUnicode(_) => {
                return Err(anyhow::anyhow!(
                    "The value of 'RUST_LOG' does not contain valid unicode \
                     data."
                ));
            }
        }
    }
    env_logger::init();

    let shared_state = Arc::new(RwLock::new(AppState::default()));

    let cors_layer = CorsLayer::new()
        .allow_methods([Method::GET, Method::POST])
        .allow_origin(Any);

    let app = Router::new()
        .route("/login", post(login))
        .route("/logout", post(logout))
        .route("/users", post(create_user))
        .route("/users", get(get_user_info))
        .route_layer(cors_layer)
        .with_state(shared_state);

    let addr = "0.0.0.0:3000".parse::<SocketAddr>()?;
    log::info!("Start listening on http://{addr}");
    let listener = TcpListener::bind(addr).await?;
    axum::serve(listener, app.into_make_service()).await?;
    Ok(())
}