Your screen ID is the one or two characters in the little circles beside
anything you add to a trip. It is how the others tell your entries from
theirs at a glance.
Passkeys
A passkey is held by this device and unlocked with Face ID, Touch ID or your
PIN. It is the only method here that cannot be phished — a convincing copy
of this site at another address cannot get one to sign.
Password
—
Google
Signing in with Google is separate from the calendar connection on your
trips — different permissions, different purpose. Connecting one here does
not give Wayfarer your calendar.