Validation form

there is no "trim" validation rule in ci4

Please put Your controller code here, and what error that showing on the first run?

There is no error shown, the check is skipped when Password has a value.

PHP Code:

$this->validation->run([

    'Firstname'     => $this->request->getPost('Firstname'),
    'Lastname'      => $this->request->getPost('Password'),
    'Username'      => $this->request->getPost('Username'),
    'Password'      => $this->request->getPost('Password'),
    'Passconfirm'   => $this->request->getPost('Passconfirm')

], 'manager');