Register a webhook for your POS for the specified connected location for all events.
If the optional locationId parameter is supplied, the webhook will be registered against the supplied location, which will effectively ensure only events for that location will be sent to that webhook. If no location is specified (or the reserved ID of all is submitted) then the webhook will be considered a global webhook, meaning any event from any subscribed location will be sent to that webhook endpoint. Only one global webhook may be registered for a given Doshii event.
For more detailed information on this specific endpoint please review the details found in the OpenAPI docs.