Redirection on Xojo Cloud

Hi All

I have a redirection issue with my App. The App connects to an accounting system for authorisation, which works fine in local host on my Mac. e.g. when I ask for a token, I’m getting back URL

However, the accounting system requires a domain name or an IP address & you can’t use or IP/myApp.

I have set up the which works fine as far as the redirection goes.

But, I’m then losing the trailing info for authorisation e.g. /?oauth_token=XXX&oauth_verifier=XXX&org=XXXX

Does anyone know how I can redirect & keep that info?

Thanks All