It sounds like you may have come across a review (perhaps on a forum, blog, or YouTube) mentioning — a popular open-source authenticator for Windows that generates 2FA (two-factor authentication) codes for sites like Google, Battle.net, Discord, and more.
The official source is: → https://github.com/winauth/winauth/releases (Original author no longer actively maintains it, but the last stable release — v3.6.x — is still widely used and trusted.) winauth download