If I link a list with the above authentication format in the playlist editor(as External) then it works but if I have the streams within the list with authentication like the above example(Doesn't matter if they are internal or external) then I get connecting for some seconds and then it fails. That is the problem but if you don't feel like troubleshooting it then it's ok since I can use the authentication in the link so I get new playlist tickets or I can just use ip range restrictions since my server and my TV are on my local network. Otherwise I can help you troubleshoot it, just let me know.
A bit offtopic but... Any chances to get EGP from tvheadend to work? Is it even possible over http? Otherwise can I send you a feed for all the Nordic channels so that you can add them to your server so they will work within the app?
PS: It's really beautiful that the logo tag works in your app as it doesn't work on Smart IPTV. The Channel icons make the menus look colorful