djangoでtwitter認証時に401エラーが出る。

Qiitaの記事　を参考にしてtwitter認証を作っているのですが、どうしてもエラーが解決できません。
（CallbackURLは用意しましたし、KEYが間違っているということもないはずです）

エラー

(myvenv) C:\Users\user\workertips\project>python manage.py runserver
Performing system checks...

System check identified no issues (0 silenced).
May 05, 2018 - 19:20:38
Django version 2.0.5, using settings 'project.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
[05/May/2018 19:20:45] "GET /twitterManager/login/ HTTP/1.1" 200 195
Not Found: /favicon.ico
[05/May/2018 19:20:46] "GET /favicon.ico HTTP/1.1" 404 2088
Internal Server Error: /twitterManager/login/twitter/
Traceback (most recent call last):
  File "C:\Users\user\workertips\myvenv\lib\site-packages\django\core\handlers\exception.py", line 35, in inner
    response = get_response(request)
  File "C:\Users\user\workertips\myvenv\lib\site-packages\django\core\handlers\base.py", line 128, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\user\workertips\myvenv\lib\site-packages\django\core\handlers\base.py", line 126, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\user\workertips\myvenv\lib\site-packages\django\views\decorators\cache.py", line 44, in _wrapped_view_func
    response = view_func(request, *args, **kwargs)
  File "C:\Users\user\workertips\myvenv\lib\site-packages\social_django\utils.py", line 49, in wrapper
    return func(request, backend, *args, **kwargs)
  File "C:\Users\user\workertips\myvenv\lib\site-packages\social_django\views.py", line 23, in auth
    return do_auth(request.backend, redirect_name=REDIRECT_FIELD_NAME)
  File "C:\Users\user\workertips\myvenv\lib\site-packages\social_core\actions.py", line 27, in do_auth
    return backend.start()
  File "C:\Users\user\workertips\myvenv\lib\site-packages\social_core\backends\base.py", line 35, in start
    return self.strategy.redirect(self.auth_url())
  File "C:\Users\user\workertips\myvenv\lib\site-packages\social_core\backends\oauth.py", line 167, in auth_url
    token = self.set_unauthorized_token()
  File "C:\Users\user\workertips\myvenv\lib\site-packages\social_core\backends\oauth.py", line 223, in set_unauthorized_token
    token = self.unauthorized_token()
  File "C:\Users\user\workertips\myvenv\lib\site-packages\social_core\backends\oauth.py", line 247, in unauthorized_token
    method=self.REQUEST_TOKEN_METHOD
  File "C:\Users\user\workertips\myvenv\lib\site-packages\social_core\backends\base.py", line 234, in request
    response.raise_for_status()
  File "C:\Users\user\workertips\myvenv\lib\site-packages\requests\models.py", line 935, in raise_for_status
    raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 401 Client Error: Authorization Required for url: https://api.twitter.com/oauth/request_token
[05/May/2018 19:20:52] "GET /twitterManager/login/twitter/ HTTP/1.1" 500 104183