post https://{project_url}/webservice/rest-api/{api_interface}/{version}/product-reservations/actions/set-product-reservation-external-codes
Set one or multiple external reservation codes of different types to the product reservation.
The method will set all the reservation codes from the request.
If a reservation code type already exists in the reservation, it will be replaced with a new value from the request. If the request does not contain the reservation code type already in the reservation, CareCloud will make no changes to the reservation code.