clean code with clippy

src/rest/admin/user.rs

@@ -44,14 +44,11 @@ async fn update(
     _admin: AdminUser,
 ) -> Flash<Redirect> {
     let user = User::find_by_id(db, data.id).await;
-    let user = match user {
-        Ok(user) => user,
-        Err(_) => {
+    let Ok(user) = user else {
             return Flash::error(
                 Redirect::to("/admin/user"),
                 format!("User with ID {} does not exist!", data.id),
             )
-        }
     };
 
     user.update(db, data.is_cox, data.is_admin, data.is_guest)