As seen in the source code, no data is kept except caching the main api used.
If you have any questions or are concerned about what data might be being stored from your account contact @zefanjajobse on GitHub or iiTz Arcur#0001 on Discord. For more information check the Discord Terms Of Service.
(usage of text from https://github.com/freeCodeCamp/100DaysOfCode-discord-bot/blob/main/PRIVACY.md)