code: public OvhOrder overTheBox_new_duration_POST(String duration, String deviceId, String offer, String voucher) throws IOException {
  		String qPath = "/order/overTheBox/new/{duration}";
  		StringBuilder sb = path(qPath, duration);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "deviceId", deviceId);
  		addBody(o, "offer", offer);
  		addBody(o, "voucher", voucher);
  		String resp = exec(qPath, "POST", sb.toString(), o);
  		return convertTo(resp, OvhOrder.class);
  	}
docs: Create order
  
  REST: POST /order/overTheBox/new/{duration}
  @param offer [required] Offer name
  @param deviceId [required] The id of the device
  @param voucher [required] An optional voucher
  @param duration [required] Duration