/**
* Get github username from llum config.
*
* @param OutputInterface $output
* @return array
*/
protected function getGithubUserNameFromConfig(OutputInterface $output)
{
$username = $this->parser->getGitHubUsername();
if (is_null($username)) {
$this->showErrorRunLlumInitFirst($output, 'username');
}
return $username;
}