pdclient/dispenser_client.go
func NewClient(apiKey string, url string, client clientDoer) *PDClient {
	return &PDClient{
		APIKey: apiKey,
		client: client,
		URL:    url,
	}
}
func NewClient(apiKey string, url string, client clientDoer) *PDClient {
	return &PDClient{
		APIKey: apiKey,
		client: client,
		URL:    url,
	}
}
//NewClient - constructor for a new dispenser client