Your Fire TV must be connected to the Internet.Wait while your screen automatically refreshed.
Simply enter the given activation code in the respective field.
In a while, an activation code will be shown on your screen.Go to the sign-in option and enter your Stan account credentials.Go to the search icon and type “Stan” in the empty field.Now you are ready to watch Stan on Apple TV.After submitting your code, then click on the activate button.
You will be asked for an activation code.Now visit /activate from any other device such as mobile and computer.Simply note it down or else pause your screen. After a while, an activation code will be prompt on your screen.Now fill up your Stan account credentials and log in.Go to the Stan app page and click on the install button.Select the Stan app from the search result.Now, go to the Search tab and enter “Stan” by using an on-screen keyboard.Turn on your Apple TV (Make sure that your Apple TV is connected to the Internet.).
See also How to activate AXS TV by using axs.tv/activate? Activate Stan on Apple TV