Update README

Author: stulzq

README_zh-CN.md

@@ -185,6 +185,8 @@ Authorization: Bearer <token>
 
 ### 1.使用缓存
 
+安装包：`AspNetCore.Authentication.ApiToken.Redis`
+
 在注册服务中添加 `AddRedisCache(op => op.ConnectionString = "<redis连接字符串>")`
 
 示例：

tests/AspNetCore.ApiToken.UnitTests/TokenTests.cs

@@ -17,6 +17,7 @@ public TokenTests(ITestOutputHelper outputHelper)
         public void CreateToken()
         {
             var token = ApiTokenTools.CreateToken("1");
+            Assert.Equal(64, token.Length);
             _outputHelper.WriteLine(token);
         }
     }