code: public OvhOrder telephony_billingAccount_accessories_POST(String billingAccount, String[] accessories, String mondialRelayId, Boolean retractation, Long shippingContactId) throws IOException {
  		String qPath = "/order/telephony/{billingAccount}/accessories";
  		StringBuilder sb = path(qPath, billingAccount);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "accessories", accessories);
  		addBody(o, "mondialRelayId", mondialRelayId);
  		addBody(o, "retractation", retractation);
  		addBody(o, "shippingContactId", shippingContactId);
  		String resp = exec(qPath, "POST", sb.toString(), o);
  		return convertTo(resp, OvhOrder.class);
  	}
docs: Create order
  
  REST: POST /order/telephony/{billingAccount}/accessories
  @param mondialRelayId [required] Use /supply/mondialRelay entry point to specify a relay point and ignore shipping contact address information entry.
  @param shippingContactId [required] Shipping contact information id from /me entry point
  @param retractation [required] Retractation rights if set
  @param accessories [required] Accessories to order
  @param billingAccount [required] The name of your billingAccount