Add serve function and remove Server re-export (#1868)

examples/oauth/src/main.rs

@@ -25,7 +25,7 @@ use oauth2::{
     ClientSecret, CsrfToken, RedirectUrl, Scope, TokenResponse, TokenUrl,
 };
 use serde::{Deserialize, Serialize};
-use std::{env, net::SocketAddr};
+use std::env;
 use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
 
 static COOKIE_NAME: &str = "SESSION";
@@ -56,13 +56,11 @@ async fn main() {
         .route("/logout", get(logout))
         .with_state(app_state);
 
-    let addr = SocketAddr::from(([127, 0, 0, 1], 3000));
-    tracing::debug!("listening on {}", addr);
-
-    axum::Server::bind(&addr)
-        .serve(app.into_make_service())
+    let listener = tokio::net::TcpListener::bind("127.0.0.1:3000")
         .await
         .unwrap();
+    tracing::debug!("listening on {}", listener.local_addr().unwrap());
+    axum::serve(listener, app).await.unwrap();
 }
 
 #[derive(Clone)]