M3u file question

I belong to a paid IPTV service that gives me a m3u8 link with my username and password embedded in the link. It gives a ton of channels that I don’t want to include in the tv guide. I’m trying to research a way to create a customized playlist file (xml or m3u?) that Kodi could use that would only use the channels I want to use and disregard the rest. Not sure how to do this though, does anyone have any ideas? Thanks!