func setupEC2(accessKey string, secretKey string, regionName string) (ec2.EC2, error) {
	e := ec2.EC2{}

	auth := aws.Auth{accessKey, secretKey}

	region := aws.Regions[regionName]
	if region.Name != regionName {
		return e, errors.New("Region is invalid")
	}

	e.Auth = auth
	e.Region = region

	return e, nil
}