Users removed from all groups if REMOTE_AUTH_DEFAULT_GROUPS isn't valid #11206
Description
NetBox version
3.4.0
Python version
3.8
Steps to Reproduce
Turn on social auth
Setup a user using a remote social login and belonging to some groups
set REMOTE_AUTH_DEFAULT_GROUPS to a group name that doesn't exist:
REMOTE_AUTH_DEFAULT_GROUPS=["notexist", ]
logout the user then log in as the user
see that the group assignments are cleared.
Expected Behavior
The REMOTE_AUTH_DEFAULT_GROUPS should just add them as a group, it shouldn't remove existing group assignments.
Observed Behavior
The user is removed from all groups.