If you've deployed your Filament admin panel to a non-local environment, and you're receiving 403 Forbidden errors when you try to access it, it's likely that you've forgotten to set up your User model to access Filament.

You must implement the FilamentUser contract:

<?php
 
namespace App\Models;
 
use Filament\Models\Contracts\FilamentUser;
use Filament\Panel;
use Illuminate\Foundation\Auth\User as Authenticatable;
 
class User extends Authenticatable implements FilamentUser
{
    // ...
 
    public function canAccessPanel(Panel $panel): bool
    {
        return str_ends_with($this->email, '@yourdomain.com') && $this->hasVerifiedEmail();
    }
}

The canAccessPanel() method returns true or false depending on whether the user is allowed to access the $panel. In this example, we check if the user's email ends with @yourdomain.com and if they have verified their email address.

You can find this information in the documentation.