Access is by organisation. Sign in with your own credentials — what you do is recorded against you and reported under your organisation's account.
Forgotten your password? Reset it by email — you will still need your authenticator to choose the new one.
A second factor is required on every account. If you have lost your authenticator, email jhenry@jhenrylaw.com — it cannot be reset from this page, and resetting a password will not get you past it.
Set a password from an invitation but never got the email asking you to confirm your address? Resend it.