replace stream_key

[hennn]

hi
i use the nginx rtmp module and i want to stream to instagram by this script
and i use this code but idont know what i replaced by key stream

exec python3 /root/itsagramlive-master/live_broadcast.py;
exec /usr/bin/ffmpeg -re -i rtmp://localhost:1935/live/name -codec copy -f flv rtmp://127.0.0.1:19350/rtmp/{stream_key};
i dont know what i use instead {stream_key} ?
thanks

[hennn]

i want to replace automaticly everytime
thanks

[hennn]

does any body have a solution?