strprfcrm/app/Http/Middleware/CatchTokenFcmMiddleware.php

<?php

namespace App\Http\Middleware;

use App\Models\User;
use Closure;
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\Response;

class CatchTokenFcmMiddleware
{
    /**
     * Handle an incoming request.
     *
     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
     */
    public function handle(Request $request, Closure $next): Response
    {
        if (isset($request->app) && isset($request->token_fcm)) {
            $token = trim((string)$request->token_fcm);

            if ($token !== '' && auth()->check()) {
                User::assignUniqueFcmToken((int)auth()->id(), $token);
            }

            session(['token_fcm' => $token]);
        }
        return $next($request);
    }
}