'Group' object has no attribute 'user_set'

[CTV-2023]

Deployment Type

Self-hosted

NetBox Version

v4.0.0

Python Version

3.11

Steps to Reproduce

Hi,

Following this discussion
#16000
I think I found a regression or missing feature between Django user/group models and Netbox models

If in a custom pipeline, calling netbox authentication model with
from netbox.authentication import Group

I can't add users to a group with group.user_set.add(user)

<class 'AttributeError'>

'Group' object has no attribute 'user_set'

I can still add groups to a user with user.groups.add(group)

(many to many relationship issue ?)

Expected Behavior

I should be able to add users to a group, like I can add groups to user

Observed Behavior

Regression from Django