Valheimlist.org is a non-profit website run by Saurek. It collects the minimum amount of information required to operate.
When you login using Discord's Oauth2 system, Discord provides us with your account name, account token, and user ID. When you de-authenticate Valheimlist.org that information is wiped after 1 week.
We do not store any query data from your Discord account. Any data received from Discord only lives in our system for as long as that request was processing, usually under 1 millisecond. The Discord information you see on pages, such as profile pictures, is not stored on our server. A secure connection is made between your web browser and Discord's servers to display that.