post
https://open-api.guesty.com/v1/properties-api/listing-settings/external-links/
Adds a new link to the property. url must include protocol (e.g. https://). name is the label shown to users (e.g. "House manual"). The new link is appended to the end; use PUT :propertyId/order to change order.
400Validation failed: url must be a valid URL with protocol; name required, 1–500 characters.
401Missing or invalid authentication. Account ID is required.
403You do not have permission to perform this action on the property.
