更新用户信息
POST https://webapi.kf5.com/kchat/message
请求参数：
{
"action":"update_visitor",
"user":{
"name":"小刘",
"openid":"e4d8c2abfc783e0b8f0d7b4eb93812e5",
"metadata":[
{
"name":"联系地址",
"value":"四川省成都市锦江区东大街时代1号"
},
{
"name":"正在查看商品",
"value":"智能手机 http://www.yourdomain.com/goods/123.html"
}
]
}}接口响应示例：
{
"error_code": 0,
"message": "请求成功"
}