On November 15, 2016, Twitch announced that the v3 API had been deprecated with the release of v5. Today, we’re moving forward with a controlled shutdown of v3 and would like to share our plans with you.
To start with, we have determined that the following application and associated client ID is still actively calling v3 endpoints:
Starting on August 12, 2019, we will begin implementing scheduled outage windows of v3 endpoints over several weeks ending with a complete shutdown of v3 endpoints on September 12, 2019. If you do not take action to migrate your application to v5 of the API, your application will experience outages during this time and will completely break on September 12.
Just got this email from Twitch
Please update the template to v5.