We made some heavy modifications to the user model to allow for authentication with a few different types of identifiers, including composite keys. Django expec

We made some heavy modifications to the user model to allow for authentication with a few different types of identifiers, including composite keys. Django expects you to set a single USERNAME_FIELD but we had to support more than one and that required changes to the auth system. By default it also didn't work with UUIDs as usernames so that took a bit of time to fix.