from gcore import Gcore

client = Gcore(
    api_key="My API Key",
)
restream = client.streaming.restreams.get(
    0,
)
print(restream.client_user_id)

{
  "name": "first restream",
  "active": true,
  "uri": "rtmp://a.rtmp.youtube.com/live/k17a-13s8",
  "stream_id": 20,
  "client_user_id": 10
}