public function execute(InputInterface $input, OutputInterface $output)
{
$backend = $input->getArgument('backend');
try {
$this->backendManager->disableBackend($backend);
$output->writeln("Chat Backend '" . $backend . "' is disabled.");
} catch (BackendNotFoundException $e) {
$output->writeln("<error>Chat Backend does not exists.</error>");
}
}
