title: How to use distinct in GraphQL query?
body: <p>Here is query where I try to use distinct in graphQl query:</p>
  
  <pre><code>query{
      contacts(take: 10, distinct: true) {
          firstName
          lastName
          title
      }
  }
  </code></pre>
  
  <p>But I am getting error:</p>
  
  <pre><code>{
      "errors": [
          {
              "message": "Unknown argument \"distinct\" on field \"contacts\" of type \"QuerySchema\".",
              "locations": [
                  {
                      "line": 2,
                      "column": 21
                  }
              ]
          }
      ]
  }
  </code></pre>