curl --location --globoff 'https://qyapi.weixin.qq.com/cgi-bin/externalcontact/convert_to_openid?access_token=' \
--header 'Content-Type: application/json' \
--data '{
"external_userid": "string"
}'{
"errcode": 0,
"errmsg": "ok",
"openid": "ooAAAAAAAAAAA"
}