Every time I go to Discord, it asks me to claim an account. I click the button to claim the account and enter my username & password, but it says the email is already taken. That's because I already have a Discord account! So how do I actually log into Discord instead of always registering? There is no login button! It always forces you to register, even if you already have an account!
I went to User Settings (Gear Icon at bottom) > Logout > Logout > then was able to log in, then click on the Discord link from the original web site to 'accept invitation' to that site's channel.