Unable to Request from Twitter Ads Api using OAuth in Python

Question

I am stuck on a issue with Twitter-ads-api. I have completed the authorization and got the oauth-verifier token, but after this I am stuck on how to request for Ads data from their URL endpoint. Here is my code after getting the verifier:

    consumer = oauth.Consumer(consumer_key, consumer_secret)
    token = oauth.Token(data[0], data[1])
    token.set_verifier(oauth_verifier)
    client = oauth.Client(consumer, token)

    # access_token_url
    resp, content = client.request(f"https://ads-api.twitter.com/11/stats/accounts/{get_account_id()}/active_entities", "GET", body={"end_time":"2022-03-07", "entity":'LINE_ITEM',"start_time":"2022-03-01"})
    print('Error ',content)
    if resp['status'] != '200':
        error_message = "Invalid response from Twitter API GET users/show: {status}".format(
            status=resp['status'])
        print(error_message)
        return error_message
    access_token = dict(urllib.parse.parse_qsl(content))

It has successfully giving response by the account name, this means that authorization is complete but how can I request other endpoints? It is giving me error:

b'{"errors":[{"code":"UNAUTHORIZED_ACCESS","message":"This request is not properly authenticated"}],"request":{"params":{}}}'
Invalid response from Twitter API GET users/show: 401

I know there is problem with my code. If anyone has this knowledge about it?