Flash data returning NULL after redirect via controller

I'm trying to show an error if the email or password is wrong, but it keeps returning NULL...

here's my code:

Code:

/*
            Validate user
        */
        $myModel = model('myModel');
        $data['result'] = $myModel->find(['email' => $this->request->getPost('email')]);
        if (!isset($data['result'][0]))
        {
            $this->session->setFlashdata('incorrect_login', true);
            $this->session->keepFlashdata('incorrect_login');
            return redirect()->to('home');
        }
        else if ($data['result'][0]['password'] === $this->request->getPost('password'))
        {
            $this->session->set('logged_in', true);
            return redirect()->to('edit');
        }
        else
        {
            $this->session->setFlashdata('incorrect_login', true);
            $this->session->keepFlashdata('incorrect_login');
            return redirect()->to('home');
        }

Try as

PHP Code:

redirect()->to('home')->with('incorrect', true); 


Simple CI 4 project for beginners codeigniter-expenses ( topic )