Return 403 on hmac error

src/routes/media.nim

@@ -122,7 +122,7 @@ proc createMediaRouter*(cfg: Config) =
       cond "http" in url
 
       if getHmac(url) != request.matches[1]:
-        resp showError("Failed to verify signature", cfg)
+        resp Http403, showError("Failed to verify signature", cfg)
 
       if ".mp4" in url or ".ts" in url or ".m4s" in url:
         let code = await proxyMedia(request, url)