Add urls to router root

[datapythonista]

Somhow related to #7830

Maybe I'm missing something (new to drf). But my use case seems quite simple. I use drf with jwt. I have couple of custom web services, and them I add simplejwt.

In the root of the API docs I get a list with my custom view, and the nice doc pages that come out of the box. But then I need to add the jwt urls there, so my frontend developers know about them too. But since they aren't ModelViews, it doesn't seem it can be easily done.

I ended up implementing my own router:

class RouterWithExtraItemsInRoot(routers.DefaultRouter):
    """ 
    Seems like there should be an easier way to add urls to the API home page.

    But since couldn't find it, this allows it, by adding elements to the
    `extra_url` dict attribute. The key is the path of the url, and the value
    is the name to reverse lookup the view.

    Examples
    --------
    router = RouterWithExtraItemsInRoot()
    router.register(...)  # register ViewSets normally
    router.extra_url['url/path'] = 'view_name'
    """
    extra_urls = {}

    def get_api_root_view(self, api_urls=None):
        api_root_dict = {}
        list_name = self.routes[0].name
        for prefix, viewset, basename in self.registry:
            api_root_dict[prefix] = list_name.format(basename=basename)

        api_root_dict.update(self.extra_urls)  # Add extra urls
        return self.APIRootView.as_view(api_root_dict=api_root_dict)

This works just fine, but seems my use case is generic enough so this (or something equivalent) is implemented in the default router.

Am I missing something? Is this something worth adding? Thanks!