This barely qualifies for a blog post, but what to do if you loaded, via django-admin.py loaddataa full json file from someone during testing, and don't have their user's password?
Just run the django-admin.py shell, and by hand reset all the passwords:
from django.contrib.auth.models import User for u in Users: u.set_password('secret') u.save()
That's why you have to keep your shell login and settings files safe !!