M3U8 question

hello,
I ‘m novice new and new your help.

I get m3u8 file from live TV and noticed that it not working after few hours , an di need to get new file.
I start to read about token didn’t foudn answers to my questins.
my questions are :

how to identify a token on the m3u8 file below?
if exist , can we modify it or other?
if there is no Token , why the file change ?
can we avoide it ?

https://edge-07.playmedia-cdn.net/origin…18386adaee

thanks ,