Mandatory login before using the subscription code
Access to the bonus scenes of Avengers Endgame on Disney+ requires prior authentication.
The person you are gifting the subscription to must log in before using the provided code or link. Without logging in, the link remains inactive and the code cannot be validated. This restriction applies to additional content, including the post-credits scenes of Avengers Endgame available on Disney+. The site clearly states that access depends on prior authentication, to ensure the recipient actually enjoys the offered content. (Source: Écran Large)