[Python] How to retrieve singleton model instance with DRF without having to provide id?

I have a django app, and I use django-solo for SingletonModel. I do have a singleton settings model:

class GeneralSettings(SingletonModel):
allow_signup = models.BooleanField(default=True)


I want to create an API endpoint to be able to retrieve and update the settings. I currently use DRF. Using RetrieveModelMixin and UpdateModelMixin I can easily do it but then my route has to be:

.../api/settings/1 < I need to add the id.

How can I retrieve / update my settings without having to use the id (since it doesn't make sens for a SingletonModel)?

DRF view:

class GeneralSettingsViewSet(
RetrieveModelMixin,
UpdateModelMixin,
GenericViewSet,
):
queryset = GeneralSettings.objects.all()
serializer_class = GeneralSettingsSerializer
http_method_names = ["get", "put"]

def get_object(self) -> GeneralSettings:
return GeneralSettings.get_solo()


Router:

router.register(r"settings", GeneralSettingsViewSet, "api-settings")

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