try vault kvv2 secret engine

main.go

@@ -153,6 +153,10 @@ func oauth2_callback(w http.ResponseWriter, r *http.Request) {
 	authorityHeader := r.Header.Get(":authority")
 	if oauthAllowedHttp2Authority != "" && authorityHeader != oauthAllowedHttp2Authority {
 		fmt.Println(":authority: "+authorityHeader)
+		fmt.Println("received headers")
+		for key, value := range r.Header {
+			fmt.Printf("%s='%s'\n", key, value)
+		}
 		http.Error(w, "Access denied: invalid referer or origin", http.StatusForbidden)
 		return
 	}
@@ -409,7 +413,6 @@ func main() {
 	// Start the HTTP server
 	port := ":8080"
 	log.Printf("Server starting on port %s\n", port)
-	fmt.Println("new version indeed")
 	err = http.ListenAndServe(port, nil)
 	if err != nil {
 		log.Fatalf("Server failed to start: %v", err)