title: com.parse.ParseRequest$ParseRequestException: invalid session token
body: <p>Hello I am working on android app in which I am using parse cloud. I have signUp into the system then after I am trying to fetch data from parse.</p>
  
  <p>But I am getting an exception everytime</p>
  
  <blockquote>
    <p>com.parse.ParseRequest$ParseRequestException: invalid session token</p>
  </blockquote>
  
  <pre><code>String userName = ParseUser.getCurrentUser().getUsername();
  ParseQuery&lt;ParseObject&gt; parseQuery = ParseQuery.getQuery("users");
  parseQuery.findInBackground(new FindCallback&lt;ParseObject&gt;() {
  
      @Override
      public void done(List&lt;ParseObject&gt; list, ParseException parseException) {
  
      }
  });
  </code></pre>
  
  <p>How we can resolve this problem.</p>