Add security log document.

Resolve #4794

docs/en/Modules/Identity.md

@@ -4,3 +4,26 @@ Identity module is used to manage [organization units](Organization-Units.md), r
 
 See [the source code](https://github.com/abpframework/abp/tree/dev/modules/identity). Documentation will come soon...
 
+
+## Identity Security Log
+
+The security log can record some important operations or changes about your account. You can save the security log if needed.
+
+You can inject and use `IdentitySecurityLogManager` or `ISecurityLogManager` to write security logs. It will create a log object by default and fill in some common values, such as `CreationTime`, `ClientIpAddress`, `BrowserInfo`, `current user/tenant`, etc. Of course, you can override them.
+
+```cs
+await IdentitySecurityLogManager.SaveAsync(new IdentitySecurityLogContext()
+{
+	Identity = "IdentityServer";
+	Action = "ChangePassword";
+});
+```
+
+Configure `AbpSecurityLogOptions `to provide the application name for the log or disable this feature. **enabed** by default.
+
+```cs
+Configure<AbpSecurityLogOptions>(options =>
+{
+	options.ApplicationName = "AbpSecurityTest";
+});
+```

docs/zh-Hans/Modules/Identity.md

@@ -2,4 +2,27 @@
 
 身份模块基于Microsoft Identity 库用于管理[组织单元](Organization-Units.md), 角色, 用户和他们的权限.
 
-参阅 [源码](https://github.com/abpframework/abp/tree/dev/modules/identity). 文档很快会被完善.
+参阅 [源码](https://github.com/abpframework/abp/tree/dev/modules/identity). 文档很快会被完善.
+
+## Identity安全日志
+
+安全日志可以记录账户的一些重要的操作或者改动， 你可以在在一些功能中保存安全日志.
+
+你可以注入和使用 `IdentitySecurityLogManager` 或`ISecurityLogManager` 来保存安全日志. 默认它会创建一个安全日志对象并填充常用的值. 如 `CreationTime`, `ClientIpAddress`, `BrowserInfo`, `current user/tenant`等等. 当然你可以自定义这些值.
+
+```cs
+await IdentitySecurityLogManager.SaveAsync(new IdentitySecurityLogContext()
+{
+	Identity = "IdentityServer";
+	Action = "ChangePassword";
+});
+```
+
+通过配置 `AbpSecurityLogOptions `来提供应用程序的名称或者禁用安全日志功能. 默认是启用状态.
+
+```cs
+Configure<AbpSecurityLogOptions>(options =>
+{
+	options.ApplicationName = "AbpSecurityTest";
+});
+```