post deprecatedhttps://api.nitrobox.io/v2/contracts//terminateContract
DEPRECATED: Use '/contracts/{contractIdent}/actions/terminate' or '/contracts/{contractIdent}/actions/terminate-extraordinarily' instead. A contract's termination can be done by setting a new end date that is usually smaller than the previous set contract end date. If no end date is set, the end of the current billing interval will be chosen as the next termination date.