title: Non-existent class: Mongo_db
body: <p>I have a problem with ion_auth . I converted all required file fit for Mongodb.
  my config liles
  mongo_db.php</p>
  
  <pre><code>&lt;?
     $config['mongo_host'] = 'localhost';
     $config['mongo_port'] = 27017;
     $config['mongo_db'] = 'tls_saas';
     $config['mongo_user'] = 'root';
     $config['mongo_pass'] = 'root';
     $config['mongo_persist'] = TRUE;
     $config['mongo_persist_key'] = 'ci_mongo_persist';
     ?&gt;
  </code></pre>
  
  <p>ion_auth.php</p>
  
  <pre><code>$config['use_mongodb'] = TRUE;
  
  /*
  | -------------------------------------------------------------------------
  | MongoDB Collection.
  | -------------------------------------------------------------------------
  | Setup the mongodb docs using the following command:
  | $ mongorestore sql/mongo
  |
  */
  $mongorestore                    = 'sql/mongo';
  $config['collections']['users']          = 'users';
  $config['collections']['groups']         = 'groups';
  $config['collections']['login_attempts'] = 'login_attempts';
  </code></pre>
  
  <p>but still i get the error</p>
  
  <blockquote>
    <p>Non-existent class: Mongo_db</p>
  </blockquote>
  
  <p>is their to make any more changes . ion_auth working with mongodb now ??</p>