curl --location --request POST 'https://streams.marsview.ai/rb/v1/streams/update_call_members' \
--header 'Authorization: Bearer <AccessToken>' \
--header 'Content-Type: application/json' \
"txnId" : "<txnId of the call>",
"members" : [{"agent": <agent channelId>}, {"user" : <user channelId>}]