Roles: Broker vs Investor in Single Panel

In the Panel Provider we enable registration and pass an action as our own custom registration page.

app/Providers/Filament/AdminPanelProvider.php:

use App\Filament\Pages\Auth\Register;
 
class AdminPanelProvider extends PanelProvider
{
    public function panel(Panel $panel): Panel
    {
        return $panel
            ->default()
            ->id('admin')
            ->path('admin')
            ->login()
            ->registration(Register::class) 
            // ...
    }
}

The registration page must extend the registration page from the Filament. In the register page, we add a radio select field for the role and set the default role to the Broker.

App/Filament/Pages/Auth/Register.php:

use Filament\Schemas\Schema;
use App\Models\Role;
use Filament\Forms\Components\Radio;
use Filament\Forms\Components\Field;
use Filament\Forms\Components\Component;
use Filament\Auth\Pages\Register as BaseRegister;
 
class Register extends BaseRegister
{
    public function form(Schema $schema): Schema
    {
        return $schema
            ->components([
            $this->getNameFormComponent(),
            $this->getEmailFormComponent(),
            $this->getPasswordFormComponent(),
            $this->getPasswordConfirmationFormComponent(),
            $this->getRoleRadioFormComponent(), 
        ]);
    }
 
    protected function getRoleRadioFormComponent(): Field 
    {
        return Radio::make('role_id')
            ->label('Select role')
            ->required()
            ->inline()
            ->exists(Role::class, 'id')
            ->options(Role::pluck('name', 'id'))
            ->default(function (Radio $component): int {
                return array_search('Broker', $component->getOptions());
            });
    } 
}

The user belongs to a role. Permissions are managed in the Policies by simply checking the user's role name.