use endpoint built into client

client/client.go

@@ -5,9 +5,18 @@ const apiEndpoint = "https://api.elevenlabs.io"
 var ErrUnauthorized error
 
 type Client struct {
-	apiKey string
+	apiKey   string
+	endpoint string
 }
 
 func New(apiKey string) Client {
-	return Client{apiKey: apiKey}
+	return Client{
+		apiKey:   apiKey,
+		endpoint: apiEndpoint,
+	}
+}
+
+func (c Client) WithEndpoint(endpoint string) Client {
+	c.endpoint = endpoint
+	return c
 }