magento demo api 403

   $url = 'https://magento2-demo.magebit.com/rest/V1/integration/admin/token';

    $data = [
        'username' => 'magebit',
        'password' => 'Demo123'
    ];

    $response = Http::post($url, $data);

    if ($response->successful()) {
        $token = $response->body();

        return $token;
    } else {
        return $response->status();
    }

while calling this api using demo credentials it’s showing 403 error why?

I try to get access token for magento api form magento demo. But it’s showing an error 403. Is it possible to access token from magento demo?