I’m not Twitch staff. Just a moderator on these forums.
There is zero reason to be rude about this matter.
Twitch can and will change the docs as it needs to as updates and changes come from the relevant teams inside Twitch. As clearly it has done in this case.
This is the simplest solution, just swap the call from Twitch directly to your backend server. Then you can benefit with your server caching the streams from Twitch or even utilizing webhooks.
Additionally you will need to change when v5 is removed completely and you have to move to Helix. As v5 is also deprecated