// ps[3] is region and is not validated here. If the region is invalid,
	// the ARN would not match any configured ARNs in the server.
	if ps[4] != "" {
		err = errors.New("invalid ARN - unsupported account-id field")
		return
	}

	res := strings.SplitN(ps[5], "/", 2)
	if len(res) != 2 {
		err = errors.New("invalid ARN - resource does not contain a \"/\"")
		return
	}

	if res[0] != string(arnResourceTypeRole) {

func ParseARN(s string) (*ARN, error) {
	// ARN must be in the format of arn:minio:s3-object-lambda:<REGION>:<ID>:<TYPE>
	if !strings.HasPrefix(s, "arn:minio:s3-object-lambda:") {
		return nil, &ErrInvalidARN{s}
	}

	tokens := strings.Split(s, ":")
	if len(tokens) != 6 {
		return nil, &ErrInvalidARN{s}
	}

	if tokens[4] == "" || tokens[5] == "" {
		return nil, &ErrInvalidARN{s}
	}

	return &ARN{
		region: tokens[3],