403 Error on Microsoft Graph API - Retrieve an online meeting by joinWebUrl

I have a python script that successfully makes a number of Graph API calls to retreive various Teams details, like subscribing to chats, getting the meeting url from the chat etc.

There is a step in the flow of API calls I need to make that is consistently giving a 403 forbidden error.

The API Endpoint I am trying to hit is GET /v1.0/users/onlinemeeting/joinweburl

Here is my python code that gets a token and executes the request:

def get_token2():
    # Get the token
    conn = http.client.HTTPSConnection("login.microsoftonline.com")

    payload = urllib.parse.urlencode({
        'client_id': 'REDACTED',
        'scope': 'https://graph.microsoft.com/.default',
        'client_secret': 'REDACTED',
        'grant_type': 'client_credentials'
    })

    headers = { 'Content-Type': 'application/x-www-form-urlencoded' }

    conn.request("POST", "/REDACTED/oauth2/v2.0/token", payload, headers)
    res = conn.getresponse()
    data = res.read()

    token2 = json.loads(data.decode("utf-8"))['access_token']

    return token2
    
    def get_online_meetings(joinWebUrl, token2):
    print(f"joinWebUrl for the second API call: {joinWebUrl}")

    url = f"https://graph.microsoft.com/v1.0/users/REDACTED/onlineMeetings?$filter=JoinWebUrl%20eq%20'{joinWebUrl}'"
    req = urllib.request.Request(url)
    req.add_header('Authorization', f'Bearer {token2}')
    try:
        with urllib.request.urlopen(req) as response:
            data = response.read()
            json_data = json.loads(data)
            print("Meeting ID: ", json_data["value"][0]["id"])
    except urllib.error.HTTPError as err:
        print(f"HTTP error occurred: {err}")
    except urllib.error.URLError as err:
        print(f"URL error occurred: {err}")
    except Exception as e:
        print(f"An error occurred: {e}")

    def main():
    chat_id = input("Enter chat ID: ")
    token = get_token()  # Retrieve the token
    joinWebUrl = get_chat(chat_id, token)
    new_token = get_token2()  # Retrieve a new token
    print(new_token)
    get_online_meetings(joinWebUrl, new_token)

    if __name__ == "__main__":
        main()

I have verified that the registered app I am using has the appropriate permissions at the application, not delegate level. Verified here by checking token2 in jwt

I feel as if I have tried everything

An additional interesting point, is that I even get a 403 when making this call with the me endpoint (user delegated authentication) and I am running as the Azure and Teams owner account.

Background on Code

I did not include my full python code, but it is a simple script just for testing out APIs that:

1. gets a token
2. gets chat entity from chat ID (user manually types in)
3. gets a new token
4. uses joinWebURL from step 2 to get organizer ID (this is the API call that fails)

Has anyone ever encountered this issue where a 403 is given even though the application has all of the required permissions and Admin Consent granted?

from 403 Error on Microsoft Graph API - Retrieve an online meeting by joinWebUrl