There is a website, twitch.tv/activate where it is necessary to put your activation code before activating your twitch application. This is a simple way to verify, that you using your Twitch tv account. Itâ€s simply to ensure that Nobody else is providing fake credentials in your name of yours. Using a proper email address and the right password, then only the application provides you access to an activation code. So simply make sure of the proper security level of every user.