Is it possible to delete multiple users at once?
Unfortunately this is not possible at the moment. User deletes are one by one. Can you expand on your use case, what causes multiple users to need to be deleted?
We have several groups, as a volunteer organization, where people can sign up for or where people belong too based upon their function within the organization. Regular changes take place so that the authorization of users must be adjusted. The bulk upload function makes sure that we can import a great amount of users at once but because we can not massively delete users, we can not change their authorization.
You really don’t want to be deleting users to change their security group membership. Try editing someone’s group membership from the admin user page, and have a script repeat that request.