CI pagination

$this->load->library('pagination');
$this->load->model('model');
$this->config->load('pagination');
$def_config = $this->config->item('pagination');
$pagination_uri_segment = $this->uri->rsegment(3);
$config = array_merge($def_config , [
    'base_url' => base_url($this->router->class . '/' . $this->router->method),
    'total_rows' => $this->model->count_all(),
    'uri_segment' => $pagination_uri_segment,
    'per_page' => 20,
]);
$this->pagination->initialize($config);
$this->load->view('view',[
    'pagination_links'=> $this->pagination->create_links(),
    'records'=> $this->model->find_all([
        'limit'=> $config['per_page'],
        'offest'=> $config['uri_segment'],
    ]),
]);