title: Azure Container Registry in Azure Web App for Containers across subscriptions
body: <p>I'm currently trying to set up an Azure Web App for Containers, linking it to a Azure Container Registry that lives inside a different subscription. That's why my initial thought was to use the <code>Private Registry</code>tab inside the Web apps <code>Container Settings</code> to enter the credentials of said Registry.</p>
  
  <p>However when I save and reload the page the settings of the <code>Azure Container Registry</code> tab are now populated and the <code>Private Registry</code> tab is empty. The issue is, that I get now get following error:</p>
  
  <p><code>2020-01-21 21:51:12.951 ERROR - DockerApiException: Docker API responded with status code=NotFound, response={"message":"pull access denied for cliswebapi, repository does not exist or may require 'docker login': denied: requested access to the resource is denied"}</code></p>
  
  <p>I assume because no password was stored. How do I configure this properly?</p>