I used my parents’ PS Vue credentials to be able to watch one of their 3 unused streams on Fire TV (instead of having to hook up a phone or laptop to my TV). No, I didn’t get all the channels (different locals, and no regional sports, among others) but I get most of them.
https://www.amazon.com/FitzyTV-Streaming-TV-Cloud-DVR/dp/B07DFW52P3