Created UserInfo (markdown)

UserInfo.md

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+# 获取User info
+
+### 对应的接口 
+Blog.Core.Common / HttpContextUser / IUser.cs
+
+
+Blog.Core.Common / HttpContextUser / AspNetUser.cs
+
+### 注入服务
+services.AddScoped<IUser, AspNetUser>();
+
+### 使用
+
+构造函数注入：
+```
+ private readonly IUser _user;
+
+
+ public ModuleController(IModuleServices moduleServices, IUser user)
+ {
+     _moduleServices = moduleServices;
+     _user = user;
+ }
+
+```
+
+直接使用：
+
+```
+ module.CreateId = _user.ID;
+ module.CreateBy = _user.Name;
+
+```