title: How to JSON parsing to GoogleSignInAccount data at flutter dart
body: <p>I want to get JSON data from GoogleSignInAccount.</p>
  
  <pre><code>_googleSignIn.onCurrentUserChanged.listen((GoogleSignInAccount account) async {
    if (account != null) {
      auth = Auth.fromJson(json.decode(account.toString()));
      _signInView.onGoogleResponse(auth);
  
    } else {
      _signInView.onGoogleResponse(null);
    }
  });
  </code></pre>
  
  <p>but 
  account.toString() returned the response =></p>
  
  <pre><code>{
   displayName: Mert TUTSAK,
   email: merttutsak@gmail.com
  }
  </code></pre>
  
  <p>I want to return the JSON object.</p>
  
  <pre><code>{
   "displayName": "Mert TUTSAK",
   "email": "merttutsak@gmail.com"
  }
  </code></pre>
  
  <p>How to make it?</p>