Adapt user admin list to show more details
These are the requirements:
- groups membership
- days left for account-life-time in Castellum
The merge request is only about the account life time.
The group membership can not easily be shown in the list because django does not allow ManyToManyFields there (docs). However, you can filter the list by group and the groups are also available in the user detail page. So IMHO this is not an issue.