code: public function getOauthInfo()
      {
          $fields = 'user_id,nick,sex,buyer_credit,avatar,has_shop,vip_info';
          $data   = $this->call('taobao.user.buyer.get', "fields={$fields}");
  
          if (!empty($data['user_buyer_get_response']['user'])) {
              $user               = $data['user_buyer_get_response']['user'];
              $userInfo['type']   = 'TAOBAO';
              $userInfo['name']   = $user['user_id'];
              $userInfo['nick']   = $user['nick'];
              $userInfo['avatar'] = $user['avatar'];
              return $userInfo;
          } else {
              E("获取淘宝网用户信息失败：{$data['error_response']['msg']}");
          }
      }
docs: 获取当前登录的用户信息
  @return array