title: How can I put $group condition to $match?
body: <p>I have simple aggregate query in mongo:</p>
  
  <pre><code>    collection.aggregate([
          { 
              $match: { owner } 
          }, { 
              $group: { 
                  _id: "$email" ,
                  count: { $sum: 1 }
              }
          }
      ])
  </code></pre>
  
  <p>but in the result I need see emails with count great than 3. </p>
  
  <p>How can I do this?</p>