LoginForm takes an email and a password, keeps one signed in on a box,
and signs in on Enter once the address reads and a password is typed;
a failed try says why above Sign in. SignupForm ticks a new password's
rules as they hold and waits for all of them and the terms.
OAuthButtons offer each provider, one spinning while the rest rest.
MagicLinkForm and ForgotPassword send a link to an address and, once
sent, say where it went and offer it again. TwoFactorInput takes a
six-digit code at once and, after one fails, clears the boxes through
forms::PinInput's new attempt, keeping its focus. The Account chapter
splits into sign-in, profile and access, and billing and team.
ZacharyZhang-NY