code: public OvhNetwork project_serviceName_network_private_POST(String serviceName, String name, String[] regions, Long vlanId) throws IOException {
  		String qPath = "/cloud/project/{serviceName}/network/private";
  		StringBuilder sb = path(qPath, serviceName);
  		HashMap<String, Object>o = new HashMap<String, Object>();
  		addBody(o, "name", name);
  		addBody(o, "regions", regions);
  		addBody(o, "vlanId", vlanId);
  		String resp = exec(qPath, "POST", sb.toString(), o);
  		return convertTo(resp, OvhNetwork.class);
  	}
docs: Create a new network
  
  REST: POST /cloud/project/{serviceName}/network/private
  @param name [required] Network name
  @param regions [required] Region where to activate private network. No parameters means all region
  @param serviceName [required] Project name
  @param vlanId [required] Vland id, between 0 and 4000. 0 value means no vlan.