Twitter-api – 403 Forbidden – Tweepy Authentication error when attempting to access tweet/user data with client.get_user()

import tweepy
import os

api_key = os.getenv('TWI_API_KEY')
api_key_secret = os.getenv('TWI_API_KEY_SECRET')
bearer_token = os.getenv('TWI_BEARER_TOKEN')
access_token = os.getenv('TWI_ACCESS_TOKEN')
access_token_secret = os.getenv('TWI_ACCESS_TOKEN_SECRET')

client = tweepy.Client(bearer_token=bearer_token,
                       consumer_key=api_key,
                       consumer_secret=api_key_secret,
                       access_token=access_token,
                       access_token_secret=access_token_secret)

user_get = client.get_user(username='twitterusers')
user_id = user_get.data.id
print(user_id)

Above, is the code I’ve written so far in my attempt to create a Twitter bot that replies to a specific user’s most recent tweet, however I did not make it far as I receive the following error when attempting to use the Client.get_user() method to retrieve a user’s Twitter ID:

tweepy.errors.Forbidden: 403 Forbidden When authenticating requests to the Twitter API v2 endpoints, you must use keys and tokens from a Twitter developer App that is attached to a Project. You can create a project via the developer portal.

I went into the Twitter developer portal –> user authentication settings, and I made sure that the app permissions were set to ‘Read and write’.

I then tried regenerating all of my keys and tokens and made sure that there was no issue with the validity of the credentials themselves.

I further confirmed it’s not an issue with the keys or tokens when I found I was able to successfully tweet without receiving any errors using the following code.

import tweepy
import os

api_key = os.getenv('TWI_API_KEY')
api_key_secret = os.getenv('TWI_API_KEY_SECRET')
bearer_token = os.getenv('TWI_BEARER_TOKEN')
access_token = os.getenv('TWI_ACCESS_TOKEN')
access_token_secret = os.getenv('TWI_ACCESS_TOKEN_SECRET')

client = tweepy.Client(bearer_token=bearer_token,
                       consumer_key=api_key,
                       consumer_secret=api_key_secret,
                       access_token=access_token,
                       access_token_secret=access_token_secret)

response = client.create_tweet(text='Testing!')

print(response)

I tried changing the credentials passed to tweepy.Client(), first using the bearer_token only. Passing the bearer_token exclusively, as I have seen done in some examples, I received the same 403 Error as mentioned above.

Then I tried passing the consumer_key, consumer_secret, access_token, access_token_secret.
In this case, I receive the following 401 error:

tweepy.errors.Unauthorized: 401 Unauthorized

Unauthorized

In either case, I am unable to utilize Client.get_user()