Validation

Sorry about that, missed the part where it said you didn't post any data.

Should be:

PHP Code:

if($validation->withRequest($this->request)->run()) { 


https://codeigniter.com/user_guide/libra...ithrequest

Or you need to manually input an $data array:

PHP Code:

if($validation->run($data)) { 


Where $data have been grabbed from the POST.

PHP Code:

$data = [
    'email' => $this->request->getPost('email'),
    'password' => $this->request->getPost('password'),
];