使用webman2 安装了redis, support目录没有 Redis.php这个文件

<?php
namespace app\index\controller;
use support\Request;
use support\Redis;
class Test
{
    public function index(Request $request)
    {
        $key = 'test_key';
        Redis::set($key, rand());
        return response(Redis::get($key));
    }

}

Error: Class "support\Redis" not found in