title: Why do I keep getting an error saying StandardPurchasingModule' does not exist in the current context?
body: <p>I am trying to do a tutorial from unity (<a href="https://unity3d.com/learn/tutorials/topics/analytics/integrating-unity-iap-your-game?playlist=17123" rel="noreferrer">https://unity3d.com/learn/tutorials/topics/analytics/integrating-unity-iap-your-game?playlist=17123</a>) and I copied the code from here. However, I keep getting an error saying: The name `StandardPurchasingModule' does not exist in the current context</p>
  
  <p>I can't figure out why this keeps happening. This is line I am getting the error on</p>
  
  <pre><code>var builder = ConfigurationBuilder.Instance(StandardPurchasingModule.Instance());
  </code></pre>