enhance documents

Author: JarvanMo

doc/AUTH.md

@@ -1,12 +1,13 @@
 ## AUTH
 
 The purpose of `sendWeChatAuth` is to get auth code and then get information for WeChat login.
-Getting `access_token` is not supported in `fluwx`. For `access_token`, please visit [official documents](https://developers.weixin.qq.com/doc/oplatform/Mobile_App/WeChat_Login/Development_Guide.html).
+Getting `access_token` is not supported in `fluwx`. For `access_token`, please visit [official documents](https://developers.weixin.qq.com/doc/oplatform/Mobile_App/WeChat_Login/Development_Guide.html#:~:text=%E5%BD%93%E5%89%8D%E5%9B%BD%E5%AE%B6%E4%BF%A1%E6%81%AF-,%E7%AC%AC%E4%BA%8C%E6%AD%A5,-%EF%BC%9A%E9%80%9A%E8%BF%87%20code%20%E8%8E%B7%E5%8F%96).
 
 ```dart
 Fluwx fluwx = Fluwx();
 fluwx.authBy(which: NormalAuth(scope: 'snsapi_userinfo', state: 'wechat_sdk_demo_test'));
  ```
 
+ Please refer to [example](https://github.com/OpenFlutter/fluwx/blob/9258ac96df2ca5316c06dc3be078a1b123b47bdd/example/lib/pages/send_auth_page.dart#L18-L19) for more details。
 > WHY? I think we shall fetch access_token or user info at backend.
 

doc/AUTH_CN.md

@@ -1,11 +1,12 @@
 ## 登录
 
-`sendWeChatAuth`的目的是为了获取code，拿到了code才能进行微信登录，可以通过[官方文档](https://developers.weixin.qq.com/doc/oplatform/Mobile_App/WeChat_Login/Development_Guide.html)查看具体流程。
+`sendWeChatAuth`的目的是为了获取code，拿到了code才能进行微信登录，可以通过[官方文档](https://developers.weixin.qq.com/doc/oplatform/Mobile_App/WeChat_Login/Development_Guide.html#:~:text=%E5%BD%93%E5%89%8D%E5%9B%BD%E5%AE%B6%E4%BF%A1%E6%81%AF-,%E7%AC%AC%E4%BA%8C%E6%AD%A5,-%EF%BC%9A%E9%80%9A%E8%BF%87%20code%20%E8%8E%B7%E5%8F%96)查看具体流程。
 
 ```dart
 Fluwx fluwx = Fluwx();
 fluwx.authBy(which: NormalAuth(scope: 'snsapi_userinfo', state: 'wechat_sdk_demo_test'));
 ```
+请查阅[example](https://github.com/OpenFlutter/fluwx/blob/9258ac96df2ca5316c06dc3be078a1b123b47bdd/example/lib/pages/send_auth_page.dart#L18-L19)获取更多信息。
 
 > 为什么不支持获取用户信息？ 我认为获取用户信息应该后端来做，即使没有后端，你也可以在dart层自己实现.