public function getOptionsList()
{
return [new InputOption('access-key-id', null, InputOption::VALUE_OPTIONAL, 'a valid AWS access key ID'), new InputOption('secret-key', null, InputOption::VALUE_OPTIONAL, 'a valid AWS secret access key'), new InputOption('bucket', null, InputOption::VALUE_OPTIONAL, 'an S3 bucket name'), new InputOption('region', null, InputOption::VALUE_OPTIONAL, 'an S3 region, e.g. us-east-1')];
}