[Fixed]-Django RemoteUserBackend Not Cleaning Username

I think you need to do like

class MyRemoteUserBackend(RemoteUserBackend):
    def clean_username(self, username):
        return username.split('\\')[1]

Then

AUTHENTICATION_BACKENDS = [
    'path.to.MyRemoteUserBackend',
    'django.contrib.auth.backends.ModelBackend',
]