title: Querying Cloud Datastore - Returning all submissions from currently logged in user
body: <p>I am trying to retrieve all entities that a user has submitted and have tried to do this by using the user's email address as the filter, but I receive this error when querying the datastore:</p>
  
  <p><code>ValueError: Name 'test@example.com' cannot contain period characters</code></p>
  
  <p>Query:</p>
  
  <pre><code>email = users.get_current_user().email()
  
  q = WorkRequest.query().filter(email)
  results = q.fetch(10)
  </code></pre>
  
  <p>Can anyone help?</p>