curl --location -g --request POST 'https://qyapi.weixin.qq.com/cgi-bin/kf/customer/upgrade_service?access_token=' \
--header 'Content-Type: application/json' \
--data-raw '{
"open_kfid": "kfxxxxxxxxxxxxxx",
"external_userid": "wmxxxxxxxxxxxxxxxxxx",
"type": 2,
"groupchat": {
"chat_id": "wraaaaaaaaaaaaaaaa",
"wording": "欢迎加入你的专属服务群"
}
}'
{
"errcode": 0,
"errmsg": "ok"
}