I want to get the key, value of the recorderEndpoint from the object.

presenter[6] outputs undefined

```
presenter = {
    id : sessionId,
    pipeline : null,
    webRtcEndpoint : null,
    presenterRoomNum : roomNum,
    roomName : presenterRoomName,
    presenterId : presenterId,
    recorderEndpoint : {uri: argv.file_uri}
}

```

I want these results. {recorderEndpoint : {uri: argv.file\_uri}}
What should I do?