title: Using WIQL, how do you query VSTS Work Items on System.Tags
body: <p>This is not an on-premise install, just VSTS.  I'm new to working with the VSTS REST API and WIQL.  I am trying to run a query that filters my work items on <code>System.Tags = 'User Generated'</code>.  When I retrieve my Work Item, I can see in the JSON:</p>
  
  <pre><code>System.Tags : "User Generated"
  </code></pre>
  
  <p>I am using the following guide to build my query and have everything working except when I try to filter on Tags.  I have tried <code>[System.Tags] Contains ('User Generated')</code>, etc.  Nothing seems to work.  Any ideas?</p>
  
  <p><a href="https://www.visualstudio.com/en-us/integrate/api/wit/wiql" rel="nofollow noreferrer">VSTS WIQL Reference</a></p>