Possible error to group routes

[Sleon4]

I have grouped routes in such a way that the groups should look like this based on the string that I am writing:

$router->group(['prefix' => 'users'], function($router) {
    $router->group(['prefix' => 'read'], function($router) {
        $router->get('/', fn() => null);
        $router->get('by-id', fn() => null);
    });
});

When obtaining the routes I obtain them in the following way through the library:

• users/read
• users/read/by-id

Having written a route of the form $router->get('/', fn() => null) you should get a route like 'users/read/' but not a 'users/read' route, this is an error mine?