code: public function batchGet(array $openIds, $lang = 'zh_CN')
      {
          $params = [];
  
          $params['user_list'] = array_map(function ($openId) use ($lang) {
              return [
                      'openid' => $openId,
                      'lang' => $lang,
                      ];
          }, $openIds);
  
          return $this->parseJSON('json', [self::API_BATCH_GET, $params]);
      }
docs: Batch get users.
  
  @param array  $openIds
  @param string $lang
  
  @return \EasyWeChat\Support\Collection