laravel获取不到session

session可以存储但是无法获取 修改 app/http/kernel.php文件

protected $middlewareGroups = [
    'web' => [
        AppHttpMiddlewareEncryptCookies::class,
        IlluminateCookieMiddlewareAddQueuedCookiesToResponse::class,
        IlluminateSessionMiddlewareStartSession::class,
         IlluminateSessionMiddlewareAuthenticateSession::class, #这句话本来是注释掉的，开启就可以了！
        IlluminateViewMiddlewareShareErrorsFromSession::class,
        AppHttpMiddlewareVerifyCsrfToken::class,
        IlluminateRoutingMiddlewareSubstituteBindings::class,
    ],

    'api' => [
        'throttle:60,1',
        'bindings',
    ],
];

如果实在构造方法中获取不到session

$this->middleware(function() {
            $this->admin = session('admin');
            $this->isLogin = $this->admin == null ? false : true;
        });