diff --git a/src/handlers.rs b/src/handlers.rs
index 8f12c87..17a5ada 100644
--- a/src/handlers.rs
+++ b/src/handlers.rs
@@ -88,7 +88,7 @@ pub async fn post_edit_signup(
 }
 
 /// Called from Stripe with the receipt of payment.
-pub async fn signup_success(session: Session, receipt: Option<Path<String>>) -> impl IntoResponse {
+pub async fn payment_success(session: Session, receipt: Option<Path<String>>) -> impl IntoResponse {
     let user: User = session.get(SIGNUP_KEY).await.unwrap().unwrap_or_default();
     if user == User::default() {
         return SignupErrorPage("who you?".to_string()).into_response();
diff --git a/src/main.rs b/src/main.rs
index cc6eeee..31c1b9f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,16 +2,13 @@ use std::net::SocketAddr;
 
 use axum::{routing::get, Router};
 use tower_http::services::ServeDir;
-use tower_sessions::{MemoryStore, SessionManagerLayer};
+use tower_sessions::{Expiry, MemoryStore, SessionManagerLayer};
 
-// "extern crate" is this olde-timey way to bring macros into the current live
-// namespace; I'm not sure why it's needed here; we're using this to allow to do
-// like such as #[derive(Error)] before a struct or enum.
 #[macro_use]
 extern crate justerror;
 
 mod handlers;
-use handlers::{get_signup, post_signup, signup_success};
+use handlers::{get_signup, payment_success, post_signup};
 
 mod templates;
 
@@ -26,17 +23,19 @@ async fn main() {
 
     // just for signups
     let session_store = MemoryStore::default();
-    let session_layer = SessionManagerLayer::new(session_store).with_secure(true);
+    let session_layer = SessionManagerLayer::new(session_store)
+        .with_secure(true)
+        .with_expiry(Expiry::OnInactivity(time::Duration::hours(16)));
 
     // the core application, defining the routes and handlers
     let app = Router::new()
         .nest_service("/assets", assets_svc)
         .route("/signup", get(get_signup).post(post_signup))
-        .route("/signup_success/:receipt", get(signup_success))
+        .route("/payment_success/:receipt", get(payment_success))
         .layer(session_layer)
         .into_make_service();
 
-    // listing on the network
+    // listening on the network
     let addr = SocketAddr::from(([127, 0, 0, 1], 3000));
     let listener = tokio::net::TcpListener::bind(&addr).await.unwrap();
     axum::serve(listener, app).await.unwrap();