Embedding dashboard in laravel

Setup env 

SUPERSET_URL=domain_name
SUPERSET_USERNAME=admin_username
SUPERSET_PASSWORD=admin_password
SUPERSET_DASHBOARD_ID=id_of_dashboard

Create a SupersetService in app/Services/SupersetService.php:

<?php

namespace App\Services;

use Illuminate\Support\Facades\Http;

class SupersetService
{
    protected $baseUrl;
    protected $username;
    protected $password;
    protected $dashboardId;

    public function __construct()
    {
        $this->baseUrl = env('SUPERSET_URL');
        $this->username = env('SUPERSET_USERNAME');
        $this->password = env('SUPERSET_PASSWORD');
        $this->dashboardId = env('SUPERSET_DASHBOARD_ID');
    }

    public function login()
    {
        $response = Http::log()->post("{$this->baseUrl}/api/v1/security/login", [
            'username' => $this->username,
            'password' => $this->password,
            'provider' => 'db',
        ]);

        return $response->json('access_token');
    }

    public function getGuestToken()
    {
        $token = $this->login();

        $response = Http::withHeaders([
            'Content-Type' => 'application/json'
        ])->log()
          ->withToken($token)
          ->post("{$this->baseUrl}/api/v1/security/guest_token", [
            'user' => [
                'username' => '',
                'first_name' => '',
                'last_name' => ''
            ],
            'resources' => [
                [
                    'type' => 'dashboard',
                    'id' => $this->dashboardId
                ]
            ],
            'rls' => []
        ]);

        if ($response->successful()) {
            return $response->json('token');
        }

        throw new \Exception('Failed to get guest token: ' . $response->body());
    }
}

in controller setup the process to get guest token

public function info(Request $request)
{
    $supersetService = new SupersetService();
    $token = $supersetService->getGuestToken();
    return view('info', [
        'token' => $token,
    ]);
}

in the blade setup the js 

<script src="https://unpkg.com/@superset-ui/embedded-sdk"></script>

<div id="dashboard" width="100%" height="500vh" class="p-6"> </div>

<script>
    supersetEmbeddedSdk.embedDashboard({
        id: '{{ env('SUPERSET_DASHBOARD_ID') }}',
        supersetDomain: '{{ env('SUPERSET_URL') }}',
        mountPoint: document.getElementById('dashboard'),
        fetchGuestToken: () => '{{ $token }}',
        dashboardUiConfig: {
            hideTitle: true,
            hideTab: true,
            hideChartControls: true,
        },
    });
    document.getElementById("dashboard").children[0].width="100%";
    document.getElementById("dashboard").children[0].height="1200vh";
    document.getElementById("dashboard").children[0].style.border="none";
    document.getElementById("dashboard").children[0].style.overflow ="hidden";
</script>