代码如下：
<?php
namespace app\admin\controller;

use think\Controller;

use app\model\User as UserModel;


class User extends Common
{
public function lis(){
$lis = UserModel::order('is_admin')->order('id')->paginate(4);
$this->assign('lis',$lis);

return $this->fetch();
}
public function add(){
$data = $this->request->param();
$res = (new UserModel())->add($data);
return $res;
}
}