WeChat.User.user_info

You're seeing just the function user_info, go back to WeChat.User module for more information.
Link to this function

user_info(client, openid)

Specs

获取用户基本信息(UnionID机制) - 官方文档

Link to this function

user_info(client, openid, lang)

Specs

获取用户基本信息(UnionID机制) - 官方文档