Issue with form validation

Here is my code -

This gives me "Undefined property: App\Controllers\Home::$validation" error.

Code:

public function login()
    {

        if (! $this->validate([
            'email' => 'required',
            'password'  => 'required'
        ])) {
            echo Services::plates('login', [
                'validation' => $this->validation
            ]);
        } else {
            //'title' => $this->request->getVar('title'),
        }

    }

However, I can fix this error using this b

Code:

$validation =  \Config\Services::validation();

but I think as per documentation I should be able to pass validation object as above.

Another issue is in the view

Code:

<?= $validation->listErrors() ?>

It just shows me error messages for the given rules above without even submitting the form along with the name of the validation view file name.

Code:

1 ROOTPATH/system/Validation/Views/list.php

    The email field is required.
    The password field is required.

What am I doing wrong?