Redirects the end-user's browser straight to Airbnb's OAuth consent
screen without showing any Host Tools UI. After the owner consents,
Host Tools auto-imports every net-new listing from that Airbnb account
into the listing group associated with ownerImportToken, then
redirects the owner to the partner's redirect URL with result query
parameters appended.

This is a browser redirect URL, not a JSON endpoint. Send the owner's
browser to this URL — do not call it with fetch or axios.

Typical integration flow:

1. Call POST /api/listingGroups/{listingGroupID}/generateOwnerImportToken
   to obtain an ownerImportToken for the target listing group.
2. Construct the auto-connect URL with the token, your allowlisted redirect
   URL, and the desired scope.
3. Redirect your end-user's browser to that URL.
4. After Airbnb consent, the owner is redirected to your redirect URL.
   Read owner-import-status to determine success or failure.

On success, the partner redirect receives:
?owner-import-status=success&imported=<n>&accountID=<id>

On failure, the partner redirect receives:
?owner-import-status=error&owner-import-error=<code>
where <code> is one of invalid-link, invalid-scope, oauth-denied,
oauth-failed, import-failed.

Listings that were already imported on this Host Tools user are skipped —
they are not re-imported or moved between groups. Only truly-new listings
are added to the group.

If the redirect parameter is missing or its domain is not allowlisted,
the endpoint returns a 400 ErrorModel response — this is the only path
that doesn't end in a 302, because there's no safe partner URL to bounce
the error to.

Only Airbnb supports headless auto-connect. Vrbo, Booking.com, and Houfy
still use the standard owner-import flow.