curl --request POST \
  --url https://sg.sobot.io/api/5/user/robot_chat \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "partnerid": "<string>",
  "question": "<string>",
  "user_nick": "<string>",
  "source": "<string>",
  "robot_flag": "<string>",
  "question_flag": "<string>",
  "request_text": "<string>",
  "channel_flag": "<string>",
  "refer_num": "<string>",
  "lan_flag": 123,
  "reception_version": 123
}
'