From the main menu of the Apple TV, select the green Hulu icon and click on the center Select button on your Apple remote. Then, choose the log in option that best fits.
If you are already a Hulu subscriber and are having trouble accessing your account, please go to our Forgot Password page to reset your password. If you initially created your Hulu subscription on your Apple TV, you are being billed through iTunes and can click the Purchased through iTunes? Restore button on the main screen of the Hulu app. You will then be able to log in with your Apple ID to access your subscription (to verify if your Hulu subscription is being billed through the iTunes store, please see this help article).
For new Hulu subscribers, first access the Hulu icon from the main screen on your Apple TV. Once you've launched Hulu, you will have the option to sign up for Hulu directly from within the app. By signing up for Hulu on your Apple TV, you will be billed each month through your Apple account. For more information about Apple billing, please visit here.
For some basic troubleshooting suggestions, go to: Settings > General > Troubleshoot
If necessary, please also try the following: