private void vcVerify(String userName, String passwd) throws Exception {
if (authenticateVcUser == null) {
String vcHost = Configuration.getString("vim.host");
int vcPort = Configuration.getInt("vim.port", 443);
String vcThumbprint = Configuration.getString("vim.thumbprint", null);
authenticateVcUser = new AuthenticateVcUser(vcHost, vcPort, vcThumbprint);
}
authenticateVcUser.authenticateUser(userName, passwd);
}