invoiceninja/app/Http/Middleware/ContactTokenAuth.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com)
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2019. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://opensource.org/licenses/AAL
 */

namespace App\Http\Middleware;

use App\Events\Contact\ContactLoggedIn;
use App\Models\ClientContact;
use App\Models\CompanyToken;
use App\Models\User;
use Closure;

class ContactTokenAuth
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {

        if( $request->header('X-API-TOKEN') && ($client_contact = ClientContact::with(['company'])->whereRaw("BINARY `token`= ?",[$request->header('X-API-TOKEN')])->first() ) ) 
        {
            
            //client_contact who once existed, but has been soft deleted   
            if(!$client_contact)
                return response()->json(json_encode(['message' => 'Authentication disabled for user.'], JSON_PRETTY_PRINT) ,403); 


            //client_contact who has been disabled
            if($client_contact->is_locked)
                return response()->json(json_encode(['message' => 'Access is locked.'], JSON_PRETTY_PRINT) ,403); 

            //stateless, don't remember the contact.
            auth()->guard('contact')->login($client_contact, false); 
            
            event(new ContactLoggedIn($client_contact)); //todo

        }
        else {

            return response()->json(json_encode(['message' => 'Invalid token'], JSON_PRETTY_PRINT) ,403);
        }

        return $next($request);
    }

}