TypeError: Consumer key must be string or bytes, not NoneType

[kovan]

Just following the tutorial here, trying to use Client for APIv2 calls, and getting this:

Traceback (most recent call last):
  File "/home/k/prj/videosdb/backend/.venv/lib/python3.10/site-packages/aiounittest/helpers.py", line 138, in decorator
    return loop.run_until_complete(future)
  File "/usr/lib/python3.10/asyncio/base_events.py", line 646, in run_until_complete
    return future.result()
  File "/home/k/prj/videosdb/backend/tests/test_downloader.py", line 168, in test_hello_twitter
    await p.publish_tweets()
  File "/home/k/prj/videosdb/backend/videosdb/publisher.py", line 18, in publish_tweets
    self.client.create_tweet(text="hi")
  File "/home/k/prj/videosdb/backend/.venv/lib/python3.10/site-packages/tweepy/client.py", line 824, in create_tweet
    return self._make_request(
  File "/home/k/prj/videosdb/backend/.venv/lib/python3.10/site-packages/tweepy/client.py", line 126, in _make_request
    response = self.request(method, route, params=request_params,
  File "/home/k/prj/videosdb/backend/.venv/lib/python3.10/site-packages/tweepy/client.py", line 68, in request
    auth = OAuth1UserHandler(
  File "/home/k/prj/videosdb/backend/.venv/lib/python3.10/site-packages/tweepy/auth.py", line 31, in __init__
    raise TypeError("Consumer key must be string or bytes, not "
TypeError: Consumer key must be string or bytes, not NoneType

My code is:

definition:

class Publisher:
    def __init__(self) -> None:
        self.db = DB()

        self.client = Client(TWITTER_KEYS["bearer token"])

    def publish_tweets(self):
        self.client.create_tweet(text="hi")

usage:

        p = Publisher()
        p.publish_tweets()

No idea what is going on here. What do you thing, guys?

Thank you for your time.

[Harmon758]

Client.create_tweet uses OAuth 1.0a User Context by default. The error occurs because you don't provide a consumer key, consumer secret, access token, or access token secret, and without those credentials, the method can't use OAuth 1.0 User Context.

If you're using a OAuth 2.0 Authorization Code Flow with PKCE access token, you can set the user_auth parameter to False, to use the access token to authenticate instead.

Otherwise, an app-only bearer token by definition is app-only and doesn't have user context, so it can't be used to perform actions on the behalf of a user, such as creating a Tweet.