Lyna sells and hands out your software from your own Discord server. A license key grants a Discord role and access to downloads from a Sonatype Nexus, and can be shared or transferred. Licenses come from Ko-fi sales, PayPal receipts or by hand. A web app gives every product a page, buyers an account area, and you an admin area.
Documentation: docs.chojo.dev/lyna, with hosting, setup and configuration.
Trivia: Lyna is the captain of the defensive guard at Crystarium in the critically acclaimed MMORPG Final Fantasy XIV, which includes a free trial that includes the entirety of "A Realm Reborn" AND the award-winning "Heavensward" expansion up to level 60 with no restrictions on playtime.