laravel - guzzle post 请求 登录 api, response返回 404，错在哪儿呢？

笔者的guzzle代码是这样的：

use GuzzleHttp\Client;
use GuzzleHttp\Cookie\CookieJar;
use GuzzleHttp\Exception\RequestException;

class getSegmentfaultArticle extends Command
{
    protected $signature = 'segmentfault:artical';

    protected $description = '获取 Segmentfault 文章的信息';

    protected $client;
    protected $crawler;

    protected $user = [];

    protected $login_page_url = '/user/login';
    protected $login_url = '/api/user/login?_=775250c435a29c7a335a11ab2f641423';
    protected $sessionId = 'web2~04u8m9qfpnt6abl6ljuqae59l0';
    protected $my_seg_home_url = '/u/greenlightt/articles';

    public function __construct(Crawler $crawler) {
        parent::__construct();

        $this->client  = new Client([
            'base_uri' => 'https://segmentfault.com',
            'headers' => [
                'User-Agent' => 'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0',
                 'Content-Type' => 'application/x-www-form-urlencoded; charset=UTF-8',
            ],
            'cookies' => true,
            'http_errors' => true,
        ]);
        $this->crawler = $crawler;

        // 获取登录名及密码
        $this->user['email'] = config('services.segmentfault.email');
        $this->user['password'] = config('services.segmentfault.password');
    }

    public function handle() {
        // 较验 auth
        if (is_null($this->user['email']) || is_null($this->user['password'])) {
            $this->error('请在 .env 文件填写 Segmentfault 账号及密码');
            return;
        }
        // 登录获取 cookies
        $this->client->request('GET', $this->login_page_url);
        $this->updateCookies();
        
        $response = $this->client->request('POST', $this->login_url,
            array(
                'form_params' => [
                    'username' => $this->user['email'],
                    'password' => $this->user['password'],
                ],
                'headers' => [
                    'Referer' => '/user/login'
                ]
            )
        );
    }
    
    /*                                                                          
     * 修改 Cookie 中的 PHPSESSID 值                                            
     */                                                                         
     protected function updateCookies() {                                        
        $config = $this->client->getConfig();                                   
        $cookie = $config['cookies']->toArray()[0];                             
        $cookie['Value'] = $this->sessionId;                                    
                                                                                    
        $config['cookies']->setCookie(                                          
           new SetCookie($cookie)                                              
        );                                                                      
     }   
}

结果报错如下：