seeing as LeanderK doesn’t want people to login may I suggest another approach. When you go live on twitch the page has the following code.
<div class="channel-status-info channel-status-info--live tw-border-radius-medium tw-inline-block"><p class="tw-strong tw-upcase">Live Now</p></div>
Write something to chache/load the page and search for that string and based off if it is there or not you could get a boolean.