Fatal error: Uncaught TypeError: App\Models\Mentee::findByUserId(): Argument #1 ($userId) must be of type int, null given, called in /home/malawim/connect.malawimuslims.com/app/controllers/MenteeController.php on line 489 and defined in /home/malawim/connect.malawimuslims.com/app/models/Mentee.php:48 Stack trace: #0 /home/malawim/connect.malawimuslims.com/app/controllers/MenteeController.php(489): App\Models\Mentee->findByUserId() #1 /home/malawim/connect.malawimuslims.com/app/core/Router.php(23): App\Controllers\MenteeController->register() #2 /home/malawim/connect.malawimuslims.com/public/index.php(79): App\Core\Router->dispatch() #3 {main} thrown in /home/malawim/connect.malawimuslims.com/app/models/Mentee.php on line 48