Building a custom authentication backend
Django allows you to authenticate users against different sources. The AUTHENTICATION_BACKENDS setting includes a list of authentication backends available in the project. The default value of this setting is the following:
['django.contrib.auth.backends.ModelBackend']
The default ModelBackend authenticates users against the database using the User model of django.contrib.auth. This is suitable for most web projects. However, you can create custom backends to authenticate your users against other sources, such as a Lightweight Directory Access Protocol (LDAP) directory or any other system.
You can read more information about customizing authentication at https://docs.djangoproject.com/en/4.1/topics/auth/customizing/#other-authentication-sources.
Whenever the authenticate() function of django.contrib.auth is used, Django tries to authenticate the user against each of the backends defined in AUTHENTICATION_BACKENDS...
