However, this mod does require a password to install or play. If you downloaded a file that asks for a password, it may be from an untrusted source (e.g., a fake or repacked version). Passwords are sometimes used by uploaders to protect archives, but they are not part of the original mod release.
It sounds like you’re referring to , which is a popular fan-made mod (not an official Rockstar remaster) that adds improved graphics, cut content, and quality-of-life features.