public function execute(InputInterface $input, OutputInterface $output)
{
if (!$this->valid($input->getArgument('token'))) {
return $this->tokenIsInvalid($output);
}
if (!$this->configExists()) {
mkdir($this->homePath() . '/.spark');
}
$this->storeToken($input->getArgument('token'));
$this->tokenIsValid($output);
}