curl --location --request POST '/passport/open/get_access_code' \
--header 'content-type: application/json' \
--data '{"access_token":"pfMeZSL0Rq"}'

{
  "data": {
    "captcha": "",
    "desc_url": "",
    "description": "",
    "access_code": "abcdefg"
  },
  "message": "success"
}