func (m *Mailgun) Call(hubMsg HubMessage) error {
	if len(m.To) == 0 {
		log.Print("MailGun: no recipients configured. Nothing to do.")
		return errors.New("MailGun: no recipients configured. Nothing to do.")
	}
	msg := mailgun.Message{
		FromName:      m.Name,
		FromAddress:   m.From,
		Subject:       "Some Subject",
		ToAddress:     m.To[0],
		CCAddressList: m.To[1:],
	}

	body, err := json.Marshal(hubMsg)
	if err != nil {
		log.Print(err)
		return err
	}
	msg.Body = string(body)
	client := mailgun.NewClient(m.Key, m.Domain)
	_, err = client.Send(msg)
	if err != nil {
		log.Print(err)
		return err
	}
	return nil
}
func (m *Mailgun) Call(hubMsg HubMessage) {
	msg := mailgun.Message{
		FromName:      m.Name,
		FromAddress:   m.From,
		Subject:       "Some Subject",
		ToAddress:     m.To[0],
		CCAddressList: m.To[1:],
	}

	body, err := json.Marshal(hubMsg)
	if err != nil {
		log.Print(err)
		return
	}
	msg.Body = string(body)
	client := mailgun.NewClient(m.Key, m.Domain)
	_, err = client.Send(msg)
	if err != nil {
		log.Print(err)
	}
}