title: express-validator, validationErrors is an empty object
body: <p>I want to check if a string is an email. This is the code.</p>
  
  <pre><code>req.checkBody('email', 'Invalid email address').isEmail();
  var validationErrors = req.validationErrors();
  
  if(validationErrors) {
      console.log(`Validation errors ${validationErrors}`);
  }
  </code></pre>
  
  <p>console output: </p>
  
  <pre><code>Validation errors [object Object]
  </code></pre>