protected function execute(InputInterface $input, OutputInterface $output) { $app = $this->getApp(); $users = json_decode(file_get_contents($app['app.users_file']), true); unset($users[$input->getArgument('username')]); file_put_contents($app['app.users_file'], json_encode($users, JSON_PRETTY_PRINT)); $app->log('User removed', ['user' => $input->getArgument('username')], Logger::INFO); }