No password to choose, remember or lose. Signing in for the first time creates
the account — it buys nothing and there is nothing to cancel.
That sign-in link cannot be used. Links work
once and expire after 15 minutes — ask for a new one.
or
What signing in with a provider does
A provider signs you in as its own account. If you already have one from an email
link and want both to reach it, sign in with the link first and then connect the provider
from your account page — that attaches it instead of starting a second account.