如何获取智能对话signature接口的token https://openai.weixin.qq.com/openapi/sign/{TOKEN}

智能对话接口一直报token无效，这里的TOKEN用的是？ https://openai.weixin.qq.com/openapi/sign/{TOKEN} { "errcode": 1001, "errmsg": "TOKEN is not valid", "rid": "621bb347" }