Yummy Email Or Username Insensitive Auth model backend for Django

Instructions

1. pip install yeouia
2. Add AUTHENTICATION_BACKENDS = ['yeouia.backends.YummyEmailOrUsernameInsensitiveAuth'] to your settings.py
3. Enjoy

Requirements

Tested for

• Python 3.8, 3.9, 3.10
• Django 2.2+

May work otherwise, but you should run tests :P

Case Insensitive ?

Django's default auth username is not case insensitive. (See #2273 and #25617)

But… Who cares ?

This backend tries:

1. username, case sensitive
2. username, case insensitive
3. email, case insensitive

And follows #20760.