Added custom URL support (DM)

vchasno.go

@@ -25,11 +25,13 @@ type Client struct {
 	defaults *DefaultParams
 }
 
+// !! If you are using Device Manager, set the CustomURL to "http(s)://HOST/api/v3".
 type Config struct {
-	Token    string
-	Cashier  string
-	Source   string
-	Defaults *DefaultParams
+	Token     string
+	Cashier   string
+	Source    string
+	Defaults  *DefaultParams
+	CustomURL string
 }
 
 type DefaultParams struct {
@@ -65,8 +67,16 @@ func NewClient(config Config) *Client {
 		defaults.DefaultTimeout = 30 * time.Second
 	}
 
+	apicfg := &api.Client{}
+
+	if config.CustomURL == "" {
+		apicfg = api.NewClient(config.Token)
+	} else {
+		apicfg = api.NewDMClient(config.Token, config.CustomURL)
+	}
+
 	return &Client{
-		api:      api.NewClient(config.Token),
+		api:      apicfg,
 		cashier:  config.Cashier,
 		source:   config.Source,
 		defaults: defaults,