XMLRPC Auth.login does not work with django.contrib.auth.backends.ModelBackend

[tash]

Calls to Auth.login always return with ''Wrong username or password'' when django.contriub.auth.backends.ModelBackend is used.

Nitrate/src/tcms/xmlrpc/api/auth.py

Line 46 in 2c3c608

user = backend.authenticate(*check_user_name(credential))

This call is wrong, as it takes a request object as first object: https://docs.djangoproject.com/en/3.0/ref/contrib/auth/#django.contrib.auth.backends.ModelBackend.authenticate

Possible fix based on the django documentation

request is an HttpRequest and may be None if it wasn’t provided to authenticate() (which passes it on to the backend).

user = backend.authenticate(None, *check_user_name(credential))

[tash]

The request argument was added in Django 1.11. This bug should be reproducible for all newer versions of Django.

[tkdchen]

Hi @tash, thanks for reporting this issue. Would you mind open a PR for this issue?

[tash]

Will do once I have time.