Put m3u link given to you by your provider in the app. Don't have a link? Buy one from a provider...
Your provider didn't provide you with a m3u link? Use what ever your provider says to use.
Login with xtreme codes API. Username, pw and url. Done. You can get all the info from the m3u line if thats what your reseller gave you. If they only gave you user and pass then you can only use their custom app.
Sorry but you've provided us zero information. We need info. Give us everything you've got