Log into your Twitch account. Navigate to your Creator Dashboard and look for the Stream section under Settings.

Copy the Primary Stream key. Then go to the Recommended Ingest Endpoints list and pick the endpoint that is the closest to the region where your Dolby.io conference is hosted.
During your conference, you will need to make a REST API call to the Dolby API using the URL of the RTMP endpoint. This ingest endpoint URL is composed of the ingest URL and the Primary Stream key:
POST /v1/api/conferences/mix/{conference_id}/live/start HTTP/1.1
Host: session.voxeet.com
Authorization: Basic base64(CONSUMER_KEY + ":" + CONSUMER_SECRET)
Content-Type: application/json
{
"uri": "rtmp://region.contribute.live-video.net/app/{stream_key}"
}
A few seconds after calling the API, you will be able to see the live stream starting on the preview player.

If you need to stop the live stream before the conference ends, call the following API:
POST /v1/api/conferences/mix/{conference_id}/live/stop HTTP/1.1
Host: session.voxeet.com
Authorization: Basic base64(CONSUMER_KEY + ":" + CONSUMER_SECRET)
Content-Type: application/json