Update README.md

README.md

@@ -1,2 +1,31 @@
 # go-session-redis
 Simple HTTP session management
+
+## Example middleware (Chi router)
+```go
+func SessionAuthenticator(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		s, err := session.SessionManager.GetOrCreateSession(w, r)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusUnauthorized)
+			return
+		}
+
+		id := s.Get("id")
+		if id == "" || id == nil {
+			http.Error(w, "Not authenticated", http.StatusUnauthorized)
+			return
+		}
+
+		err = s.UpdateTTL()
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusBadGateway)
+			return
+		}
+
+		// Session is valid
+		next.ServeHTTP(w, r)
+	})
+}
+
+```