How to load config options into library from model. in Ci4.5

I have this from ci2.2 I want to know how I can do this in CI4.5

PHP Code:

        $config = array(
            'Sandbox' => FALSE, 
            'APIUsername' => $pp_username,
            'APIPassword' => $pp_password, 
            'APISignature' => $pp_signature, 
            'APISubject' => '',     
            'APIVersion' => $this->config->item('APIVersion')
        );
        $this->load->library('paypal/Paypal_pro', $config); 


Thanks