If you can't see us in the box below, you'll need to allow "twitch.TV" to set cookies in your browser. 

This varies for every browser, but here's the short steps for the chrome browser:
1 - go to chrome://settings/content/cookies
2 - click the "add" button near "Allow", enter "[*.]twitch.tv" in the box and click "Save"
3 - reload this page