sub deleteUser {
# in: app access token, app id, FB userId to delete
# deletes user using app access token
# out: nothing
  my ($accessToken, $appId, $userId) = (shift, shift, shift);
  my %form = (
    method => 'delete',
    access_token => $accessToken
  );
  my $url = 'https://graph.facebook.com/' . $userId;
  my $post = hitFbNew2('post', $url , \%form);
  return ($post);
}