Sending media as chat participant, Conversations API

Issue Summary

Issue is that library is executing POST method onto url = https://media.twilio.com/v1/Services/<Service_SID>/Media instead of https://mcs.us1.twilio.com/v1/Services/<Service_SID>/Media. When I change URL in twilio/base/domain.py everything is working good.

Code Snippet

        with open(os.getenv('PICTURE'), 'rb') as f:
            file = f.read()
        auth = account_sid + ":" + auth_token
        auth_bytes = auth.encode("ascii")

        base64_bytes = base64.b64encode(auth_bytes)
        base64_string = "Basic " + base64_bytes.decode("ascii")

        media = client.media.v1 \
            .create(
                method="POST",
                headers=
                {
                    "Content-Type": "image/png",
                    "Authorization": base64_string},
                data=file,
                uri="/Services/" + os.getenv('DEFAULT_SERVICE_SID') + "/Media")

Exception/Log

Error ::
HTTP 404 error: Unable to create record: The requested resource /Services/<Service_SID>/Media was not found

Technical details:

• twilio-python version: 7.8.0
• python version: 3.9

Start in twilio/base/domain.py and trace how client.media.v1 builds the media request URL. Confirm that creating Conversations media targets mcs.us1.twilio.com rather than media.twilio.com, and verify the reported 404 no longer occurs for the provided media upload call.