Take result from one query / mutation and pipe to another : <p>I'm wondering if there's a way in GraphiQL that will let me pipe the result from one query / mutation into another query / mutation. Here's an example where the <code>login</code> mutation is used to get a <code>viewer</code> and the <code>viewer</code> would be used to query the <code>addresses</code> for that user. Is this possible with GraphQL / GraphiQL.</p>

<pre><code>mutation {
  login(credentials: {
    email: "me@me.com",
    password: "password123",
    passwordConfirmation: "password123"
  }) {
    viewer
  }
}

query {
  addresses(viewer:viewer) {
    city
  }
}
</code></pre>
