code: public OvhOrder email_pro_service_account_duration_POST(String service, String duration, Long number) throws IOException {
  		String qPath = "/order/email/pro/{service}/account/{duration}";
  		StringBuilder sb = path(qPath, service, duration);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "number", number);
  		String resp = exec(qPath, "POST", sb.toString(), o);
  		return convertTo(resp, OvhOrder.class);
  	}
docs: Create order
  
  REST: POST /order/email/pro/{service}/account/{duration}
  @param number [required] Number of Accounts to order
  @param service [required] The internal name of your pro organization
  @param duration [required] Duration