Incompatibility with Django 2.1

[lamcw]

Upgrading to Django 2.1 breaks user authentication.

How to reproduce

python manage.py runserver

logs:

Performing system checks...

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x7f21e911c7b8>
Traceback (most recent call last):
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/utils/autoreload.py", line 225, in wrapper
    fn(*args, **kwargs)
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 117, in inner_run
    self.check(display_num_errors=True)
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/core/management/base.py", line 379, in check
    include_deployment_checks=include_deployment_checks,
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/core/management/base.py", line 366, in _run_checks
    return checks.run_checks(**kwargs)
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/core/checks/registry.py", line 71, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/core/checks/urls.py", line 13, in check_url_config
    return check_resolver(resolver)
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/core/checks/urls.py", line 23, in check_resolver
    return check_method()
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/urls/resolvers.py", line 396, in check
    for pattern in self.url_patterns:
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/utils/functional.py", line 37, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/urls/resolvers.py", line 533, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/utils/functional.py", line 37, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/urls/resolvers.py", line 526, in urlconf_module
    return import_module(self.urlconf_name)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/lamcw/dev/compclub-web/compclub/urls.py", line 21, in <module>
    path('', include('website.urls')),    
  File "/home/lamcw/dev/compclub-web/venv/lib/python3.7/site-packages/django/urls/conf.py", line 34, in include
    urlconf_module = import_module(urlconf_module)
  File "/usr/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/lamcw/dev/compclub-web/website/urls.py", line 9, in <module>
    path('accounts/login/', auth_views.login, {'redirect_authenticated_user': True}, name='login'),
AttributeError: module 'django.contrib.auth.views' has no attribute 'login'

Apparently django.contrib.auth.views.login and django.contrib.auth.views.logout does not exist anymore.