laravel护照oauth功能使用卷曲或guzzle

我在api路由文件中有这条路由

Route::post('/user/register', 'HomeController@register');

并且寄存器功能是

public function register(Request $request)
 {
    $user = User::create([
        ...
    ]);
    return $this->getAccessToken($request);
}

public function getAccessToken(Request $request)
{
    $url = url('/oauth/token');
    $headers = ['Accept' => 'application/json'];
    $http = new Client;

    $response = $http->post($url, [
        'headers' => $headers,
        'form_params' => [
            'grant_type' => 'password',
            'client_id' => 'my_client_id',
            'client_secret' => 'my_client_secret',
            'username' => 'username',
            'password' => 'password'
        ],
    ]);

    return json_decode((string)$response->getBody(), true);
}

现在,当我发送post请求到url用户是创建但请求继续加载没有响应和整个应用程序挂起,直到我关闭IDE - phpstorm - 我发送相同的参数到postman相同的URL /oauth/token,它工作正常.任何帮助或任何人告诉我我失踪了什么？