djangoでアカウント作成機能を追加していますが、エラーを解決できません。  
カスタムユーザーを使用しています。  
ネットの情報を参考にしています。  
わかるかたお願いします。

```

    Internal Server Error: /accounts/signup/
    Traceback (most recent call last):
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
        response = get_response(request)
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/core/handlers/base.py", line 115, in _get_response
        response = self.process_exception_by_middleware(e, request)
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/core/handlers/base.py", line 113, in _get_response
        response = wrapped_callback(request, *callback_args, **callback_kwargs)
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/views/generic/base.py", line 71, in view
        return self.dispatch(request, *args, **kwargs)
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/views/generic/base.py", line 97, in dispatch
        return handler(request, *args, **kwargs)
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/views/generic/edit.py", line 172, in post
        return super().post(request, *args, **kwargs)
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/views/generic/edit.py", line 141, in post
        if form.is_valid():
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/forms/forms.py", line 185, in is_valid
        return self.is_bound and not self.errors
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/forms/forms.py", line 180, in errors
        self.full_clean()
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/forms/forms.py", line 383, in full_clean
        self._post_clean()
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/contrib/auth/forms.py", line 107, in _post_clean
        super()._post_clean()
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/forms/models.py", line 403, in _post_clean
        self.instance.full_clean(exclude=exclude, validate_unique=False)
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/db/models/base.py", line 1188, in full_clean
        self.clean()
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/contrib/auth/models.py", line 339, in clean
        self.email = self.__class__.objects.normalize_email(self.email)
      File "/anaconda3/envs/active/lib/python3.7/site-packages/django/db/models/manager.py", line 188, in __get__
        cls._meta.swapped,
    AttributeError: Manager isn't available; 'auth.User' has been swapped for 'users.User'
    
```

```

    <form action="" method="POST">
        {{ form.non_field_errors }}
        {% for field in form %}
        <div class="form-group">
            <label for="{{ field.id_for_label }}">{{ field.label_tag }}</label>
            {{ field }}
            {{ field.errors }}
        </div>
        {% endfor %}
        {% csrf_token %}
        <button type="submit" class="btn btn-primary btn-lg">送信</button>
    </form>
    
```

```

    from django.contrib.auth.forms import UserCreationForm
    from django.contrib.auth import get_user_model
    
    User = get_user_model()
    
    class SignUpForm(UserCreationForm):
        """ユーザー登録用フォーム"""
    
        class Meta:
            model = User
            fields = ('email',)
    
        def __init__(self, *args, **kwargs):
            super().__init__(*args, **kwargs)
            for field in self.fields.values():
                field.widget.attrs['class'] = 'form-control'
    
        def clean_email(self):
            email = self.cleaned_data['email']
            User.objects.filter(email=email, is_active=False).delete()
            return email
    
```

```

    class SignUp(CreateView):
        form_class = UserCreationForm
        template_name = "accounts/signup.html"
        success_url = reverse_lazy('')
    
        def form_valid(self, form):
            user = form.save(commit=False)
            user.is_active = False
            user.save()
            # アクティベーションURLの送付
            current_site = get_current_site(self.request)
            #domeinの取得
            domain = current_site.domain
            context = {
                'protocol': self.request.scheme,
                'domain': domain,
                'token': dumps(user.pk),
                'user': user,
            }
            #templateを呼び出す
            subject = render_to_string('mail/create/subject.txt', context)
            message = render_to_string('mail/create/message.txt', context)
    
            user.email_user(subject, message)
            return redirect('accounts:SignUpDone')
    
    class SignUpDone(TemplateView):
        """ユーザー仮登録したよ"""
        template_name = 'accounts/signupdone.html'
    
    class SignUpComplete(TemplateView):
        """メール内URLアクセス後のユーザー本登録"""
        template_name = 'accounts/signupcomplete.html'
        timeout_seconds = getattr(settings, 'ACTIVATION_TIMEOUT_SECONDS', 60*60*24)  # デフォルトでは1日以内
    
        def get(self, request, **kwargs):
            """tokenが正しければ本登録."""
            token = kwargs.get('token')
            try:
                user_pk = loads(token, max_age=self.timeout_seconds)
    
            # 期限切れ
            except SignatureExpired:
                return HttpResponseBadRequest()
    
            # tokenが間違っている
            except BadSignature:
                return HttpResponseBadRequest()
    
            # tokenは問題なし
            else:
                try:
                    user = User.objects.get(pk=user_pk)
                except User.DoesNotExist:
                    return HttpResponseBadRequest()
                else:
                    if not user.is_active:
                        # 問題なければ本登録とする
                        user.is_active = True
                        user.save()
                        return super().get(request, **kwargs)
    
            return HttpResponseBadRequest()
    
```
CC BY-SA 4.0
2019-07-22T13:13:04.370
56818
2020-01-23T08:00:41.190
2019-07-22T15:27:42.150
3060
35203
question
python django
django Manager isn't available; 'auth.User' has been swapped for 'users.User'
```

    form_class = UserCreationForm
    
```

の記載をSignUpFormに変更したらうまくいきました。
CC BY-SA 4.0
2019-07-23T14:21:31.153
56847
2019-07-23T15:41:04.403
2019-07-23T15:41:04.403
32986
35203
56818
answer