With this function you can cancel a reservation. This is only possible with a valid reservationId.
apiKey + environment + reservationId + userId
|apiKey||String||Your public apiKey needs to be included in every request.|
|environment||Enum||"test" or "production"|
|userId||Integer||The userId is a reference to the user (museum / attraction). The userId can be requested via getAvailableUsers and can be cached in your application.|
|reservationId||Integer||Include the reservationId from the createReservation request.|
|HMACKey||String||The HMACKey is calculated based on the input fields.|
|success||Boolean||Indicates if the request was successfully executed.|