Forgot my password
Confirm the Discord account you linked to your game account. The site then lists the accounts linked to it, you pick one and set the new password.
The new password is typed here on the site, never on Discord. And we never see your Discord password.
It only works for accounts that have Discord linked. If yours was never linked, link it first — that needs your current password. If you do not have that either, talk to an administrator on Discord.