public ConversationService(final String versionDate,String username,String password){
  this(versionDate);
  setUsernameAndPassword(username,password);
}

public ConversationService ( final String versionDate , String username , String password ) { this ( versionDate ) ; setUsernameAndPassword ( username , password ) ; }
returns an instance of the conversation service using the service ' s default endpoint ( url ) , username and password .
