title: Get username from SharePoint User field in List
body: <p>I have a custom sharepoint workflow that I'm developing in Visual Studio. The workflow is running against a document library which has a custom content type connected to it. The content type includes a user lookup field ("owner").</p>
  
  <p>I'm trying to have my workflow assign a task to the "owner" lookup field. However, I've only been able to get the display name for the user, not the account username.</p>
  
  <p>Can anyone help?</p>