To create a connection between your Discord and Roblox accounts, so you can get verified within servers
The only information stored is your Roblox and Discord user IDs
The Login with Discord and Login with Roblox data is stored as a cookie in your browser.
Usually within a few seconds after clicking Finish.
If it takes longer, you can retry after a short cooldown.
To unlink your Roblox verification profile you need to use the Delete Profile button when you use the RoCord bot in a server. (this will also remove your Verified role in that server, if it's setup by the server Admins/Managers)
To clear the data shown on the site for your signed in accounts press the Log out or Change Account buttons or clear out your cookies for the site
If you want to unlink the RoCord application to your Roblox account visit your Roblox Settings to manage linked services.