getId(Object) 추가

src/main/java/cokr/xit/base/security/SecuredUserInfo.java

@@ -60,6 +60,20 @@ public class SecuredUserInfo extends UserInfo implements UserDetails {
 	private List<Authority> authorities;
 	private boolean sealed;
 
+	@Override
+	public String getId(Object auth) {
+		UserInfo userInfo = null;
+		if (auth instanceof Authentication) {
+			Object obj = ((Authentication)auth).getPrincipal();
+			if (obj instanceof UserInfo)
+				userInfo = (UserInfo)obj;
+		}
+		if (userInfo == null)
+			throw new RuntimeException(String.format("Unable to get a UserInfo from %s", auth));
+
+		return userInfo.getId();
+	}
+
 	@Override
 	public List<Authority> getAuthorities() {
 		return authorities != null ? authorities : Collections.emptyList();