1. Extend your user model from the Firepit User model:
<?php

namespace App\Models;

use Firepit\Cms\Models\User as FirepitUser;

class User extends FirepitUser
{
}
Add this class to the $middleware array: 
Route::middleware([\Firepit\Cms\Http\Middleware\SiteMiddleware::class])->group(function(){
    // Your routes
});
If you’re using multi-language, also add this middleware: 
\Firepit\Cms\Http\Middleware\SiteLanguageMiddleware::class