title: How to check if a customer from Google domain installed our app?
body: <p>We're developing an app that will be published in G Suite Marketplace.</p>
  
  <p>I know that both domain owners and regular Google account holders can install the application from there.</p>
  
  <p>However, the <a href="https://developers.google.com/gsuite/marketplace/v2/reference/customerLicense/get" rel="nofollow noreferrer" title="customerLicense">customer license</a> resource from the Marketplace API doesn't accept Gmail addresses, rather only domain names.</p>
  
  <p>So my question is: how to know if <code>example@gmail.com</code> did install our application in G Suite Marketplace?</p>
  
  <p>Thank you!</p>