Also add error for previous changes

auth-new/errors.go

@@ -21,6 +21,11 @@ var (
 	// The given totp token was recently (90 seconds) used for that username
 	// For security reasons, this case will be caught and blocked
 	ErrTotpRecentlyUsed = errors.New("totp token was used too recently")
+	// The stored data for a passkey registration wasn't formatted correctly
+	// and thus can't be used
+	ErrInvalidPasskeyRegistrationData = errors.New(
+		"stored passkey registration data was formatted badly",
+	)
 )
 
 // Helper error type to combine two errors into one