In the Bloodborne for Windows launcher, open Online co-op.
Under Co-op pool, pick SuperMedo Server.
Type your Online ID and password in the Account boxes.
Create an account
If an account matches, a link is on its way to its email. It works for an hour; check your spam folder too.
Made your account with Sign in with Discord? It has no email: just sign in with Discord in the launcher again.
Done, . Type the new password in the launcher's Account boxes (Online co-op, SuperMedo Server).
Your Discord on your profile
Your Online ID's public statistics (on the website, and in Discord bots that use the server's API) can show your Discord name, so friends know it's you. It's off unless you turn it on.
For accounts made with Sign in with Discord. You sign in with Discord once to choose.