[1.11] custom backend not working

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2

iQEcBAEBCAAGBQJaGdO/AAoJEPwUlFZ8c0AeJZ8H+wSNxdxq8jpcofwCrRYsHX/h
bGDlxAPaxB5Ank3JvbtsrejDLkHImQNEj9dcbP5OXGGrLiUsqvKm1qk0WCiDFUON
RY54Vr7gbdHqKOtPLO2gPd7NeF6eH39W+9PTYSl6guCc6xf/bBkP97EgyXvOUu30
Z8uhws4FZ7aqglhp2sc/kzgBZKrZg5S5Q6JhBoaviahAuY3TyCIs4dEJoPYYGRMM
jzI2Jo/GJyGdM6NuSq5C1W16xf4vG2Sc71wRfzLJDwEdWncq7bRCWJ9KybCEz8XX
9WZN2i4QQMgmK43q6UCK6D1pccFz5QOsyf0vcdey7hwG5QJaOzCjbuIh07mfLMU=
=cGLV
-----END PGP SIGNATURE-----
Hi,

for certain reasons I need to define custom user model and backend. First I only created a custom backend and kept with the standard user table Django provides. Authentication seems to work fine but the login is broken. By my view you can see that in case the user .is_authenticated a redirect happens. When I print the request.user I always end up with "AnonymousUser" even after successful authentication. So I assume the login is stuck. But what did I do wrong? I can't see a difference to what is guided in the documentation.

# django imports  from django.contrib.auth import get_user_model      UserModel = get_user_model()      class MyBackend(object):      def authenticate(self, request, username, password):          try:              user = UserModel.objects.get_by_natural_key(username)          except UserModel.DoesNotExist:              return None          else:              if argon2.verify(password, user.password) and self.user_can_authenticate(user):                  return user        def user_can_authenticate(self, user):          # is_active = getattr(user, 'is_active', None)          return is_active or is_active is None        def get_user(self, username):          try:              user = UserModel.objects.get(username=username)          except UserModel.DoesNotExist:              return None          else:              return user if self.user_can_authenticate(user) else None    

This is my view:

from django.contrib.auth import authenticate, login, logout  from django.contrib.auth.models import User      @require_http_methods(["GET", "POST"])  def index(request):      context = {'tables': None,                 'content': 'login',                 'session': None,                 'user': None}        if request.user.is_authenticated:          return HttpResponseRedirect('/rtd')        form = forms.LoginForm(request.POST)        # POST      if request.method == 'POST':          if form.is_valid():              username = form.cleaned_data['user']              password = form.cleaned_data['password']              # authenticate user              user = authenticate(request=request, username=username, password=password)              if user is not None:                  # login user                  login(request, user)                  # message + log entry                  message = 'Authentication successful! User "{}" logged in.'.format(user)                  log.info(message)                  data = {'response': True,                          'message': message}                  return JsonResponse(data)              else:                  # check if username exist to track failed login attempts                  if models.Users.objects.filter(username=username).exists():                  if User.objects.filter(username=username).exists():                      message = 'User "{}" tried to log in.'.format(username)                      log.warning(message)                  # message + log entry                  message = 'Authentication failed! Please provide valid username and password.'                  # log.warning(message)                  data = {'response': False,                          'message': message}                  return JsonResponse(data)          else:              # message + log entry              message = 'Authentication failed! Please provide valid username and password.'              # log.warning(message)              data = {'response': False,                      'message': message}              return JsonResponse(data)        # GET      else:          context['login'] = [forms.LoginForm().as_p()]          return render(request, 'lab/index.html', context)

settings:

AUTHENTICATION_BACKENDS = [      'lab.backend.MyBackend',      # 'django.contrib.auth.backends.ModelBackend'  ]    # AUTH_USER_MODEL = 'lab.Users'

Thanks for any help !!!