参考文档：https://www.cyberbiz.io/support/?p=675
官方文档：https://developers.line.biz/zh-hant/docs/line-login/integrate-line-login-v2/#%E6%8E%A5%E6%94%B6%E6%8E%88%E6%AC%8A%E7%A2%BC
一：授权
https://access.line.me/oauth2/v2.1/authorize?
response_type=code
&client_id=1657222678
&redirect_uri=http://jition.xyz/lineAu2.html?authSource=LINE
&state=12345abcde
&scope=profile%20openid%20email
&nonce=09876xyz
&prompt=consent
