Invalid OAuth token

Here is a code snippet from function

this is defined
self.url = https://api.twitch.tv/helix

get_userdata_by_login(self, login)

value = HTTPManager.request(

                method="GET",

                url=self.url + "/users",

                params={"login": login},

                headers={

                    "Client-ID": self.client_auth.client_id,

                    "Authorization": f"{self.authorization_prefix} {self.access_token_manager.access_token}"

                }
).json()

which calls:

requests.session.request(

                method=method,

                url=url,

                params=params,

                headers=headers,

                json=json,

                timeout=HTTPManager.timeout
)