Samsung TV and IPTV

I had a question I was hoping this sub could help answer. I currently have an iptv subscription that requires a username and password, I've been using it for a while with an Android box and it's been working great! I really want to start using this iptv sub on my Samsung smart TV. The thing is the actual Android app for it doesn't support Chromecast. So right now I am looking for an app from the Samsung app store that would help me do this. Is this possible? I've read so many diffrent kinds of answers and I'm a bit confused about it. If anyone can chime in with some advice that would be great!