auth.go
func EnvKeys() (keys Keys, err error) {
	keys = Keys{
		AccessKey:     os.Getenv("AWS_ACCESS_KEY_ID"),
		SecretKey:     os.Getenv("AWS_SECRET_ACCESS_KEY"),
		SecurityToken: os.Getenv("AWS_SECURITY_TOKEN"),
	}
	if keys.AccessKey == "" || keys.SecretKey == "" {
		err = fmt.Errorf("keys not set in environment: AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY")
	}
	return
}
func EnvKeys() (keys Keys, err error) {
	keys = Keys{
		AccessKey:     os.Getenv("AWS_ACCESS_KEY_ID"),
		SecretKey:     os.Getenv("AWS_SECRET_ACCESS_KEY"),
		SecurityToken: os.Getenv("AWS_SECURITY_TOKEN"),
	}
	if keys.AccessKey == "" || keys.SecretKey == "" {
		err = fmt.Errorf("keys not set in environment: AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY")
	}
	return
}
// EnvKeys Reads the AWS keys from the environment