diff --git a/authorization-server/src/main/java/io/bluemoon/authorizationserver/domain/social/UserArgumentResolver.java b/authorization-server/src/main/java/io/bluemoon/authorizationserver/domain/social/UserArgumentResolver.java
index dab71ff..c905eaa 100644
--- a/authorization-server/src/main/java/io/bluemoon/authorizationserver/domain/social/UserArgumentResolver.java
+++ b/authorization-server/src/main/java/io/bluemoon/authorizationserver/domain/social/UserArgumentResolver.java
@@ -197,6 +197,4 @@ public class UserArgumentResolver implements HandlerMethodArgumentResolver {
         }
 
     }
-
-
 }
diff --git a/readme.md b/readme.md
index b16a663..616ea82 100644
--- a/readme.md
+++ b/readme.md
@@ -9,4 +9,46 @@
 - usage
 - gradle
 - Goals
-- keys points of sample
\ No newline at end of file
+- keys points of sample
+
+### 간단한 설명
+
+
+### 시스템 구성도
+
+
+### 목표
+
+
+### SSO Login Flow
+
+
+### Zuul
+
+
+### Authorization Server
+
+
+### Keys Points of Sample
+
+
+### Ref
+
+
+SSO
+
+Zuul gateway
+- sso Login path 
+    - application.properties (security.oauth2.sso.login-path = /login)
+    - 위의 sso login path 프로퍼티 설정은 Authorization Server 의 login page로 리다이렉트 해준다.
+    
+- filter
+    - csrf RequestMatcher
+
+@EnableOAuth2Sso
+@ResourceServer
+WebSecurityConfigurerAdapter
+- HttpSecurity http setting
+
+
+Authorization Server