How to obtain the available lists

it.mailupnet.services.MailupSend myService = new it.mailupnet.services.MailupSend();
string s1 = myService.LoginFromId(user, password, myConsoleId);
 
...//extract accessKey value

string s2 = myService.GetLists(accessKey);
 
...//extract errorCode value from s2

if (errorCode == 0)
{
  // executing return message parsing to retrieve all the MailUp lists
  // that are currently available in the administration console
}