Prometheus namespaces

[rizlas]

Hi,
I'm trying to add PROMETHEUS_METRIC_NAMESPACE = "netbox" (https://github.com/korfuri/django-prometheus/blob/master/README.md?plain=1#L91) setting to extra.py file

This setting seems to be ignored and metrics are not being prefixed with the namespace.

Of course, adding this parameter to settings.py works fine.

What I'm missing here?