func (c *CustomerIO) AddDevice(customerID string, deviceID string, platform string, data map[string]interface{}) error {
	if customerID == "" {
		return errors.New("customerID is a required field")
	}
	if deviceID == "" {
		return errors.New("deviceID is a required field")
	}
	if platform == "" {
		return errors.New("platform is a required field")
	}

	body := map[string]map[string]interface{}{"device": {"id": deviceID, "platform": platform}}
	for k, v := range data {
		body["device"][k] = v
	}
	j, err := json.Marshal(body)

	if err != nil {
		return err
	}

	status, responseBody, err := c.request("PUT", c.deviceURL(customerID), j)

	if err != nil {
		return err
	} else if status != 200 {
		return &CustomerIOError{status, c.deviceURL(customerID), responseBody}
	}

	return nil
}
func (c *CustomerIO) AddDevice(customerID string, deviceID string, platform string, data map[string]interface{}) error {
	if customerID == "" {
		return errors.New("customerID is a required field")
	}
	if deviceID == "" {
		return errors.New("deviceID is a required field")
	}
	if platform == "" {
		return errors.New("platform is a required field")
	}

	body := map[string]map[string]interface{}{"device": {"id": deviceID, "platform": platform}}
	for k, v := range data {
		body["device"][k] = v
	}
	j, err := json.Marshal(body)

	if err != nil {
		return err
	}

	status, responseBody, err := c.request("PUT", c.deviceURL(customerID), j)

	if err != nil {
		return err
	} else if status != 200 {
		return &CustomerIOError{status, c.deviceURL(customerID), responseBody}
	}

	return nil
}
// AddDevice adds a device for a customer