code: function getAccountInfo()
      {
          $response = $this->doGet($this->apiHost, "1/account/info");
          if ($response->statusCode !== 200) throw RequestUtil::unexpectedStatus($response);
          return RequestUtil::parseResponseJson($response->body);
      }
docs: Make an API call to get basic account and quota information.
  
  <code>
  $client = ...
  $accountInfo = $client->getAccountInfo();
  print_r($accountInfo);
  </code>
  
  @return array
  See <a href="https://www.dropbox.com/developers/core/docs#account-info">/account/info</a>.
  
  @throws Exception