Youtube api v3 - how set the stream key on new event

Question

i have few stream keys created in youtube studio

With this example code, i can create a new event, but it always create a new stream (called New Stream in this example) ,I wonder, how can I set/force to use a previous stream key (cam1profile for example)

The working code is from enter link description here and just modified with my api keys

Answer 1

Ok I got the solution , just need to figure out the stream id I want to use and bind it to the broadcast

$stream_id='ls7ACzSkqopkYLg2N3ghmQ15498827578945';
$bindBroadcastResponse = $youtube->liveBroadcasts->bind(
    $broadcastsResponse['id'],'id,contentDetails',
        array(
            'streamId' => $stream_id,
        ));