WeChat.WebPage.refresh_token

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

refresh_token(client, refresh_token)

Specs

refresh_token(WeChat.client(), refresh_token()) :: WeChat.response()

网页授权 - 刷新access_token

由于access_token拥有较短的有效期,当access_token超时后,可以使用refresh_token进行刷新,

refresh_token有效期为30天,当refresh_token失效之后,需要用户重新授权。

官方文档: