You could try something like:

    $url = 'https://oc.com/api/v1/employees/?page=1';
    $data = array();
    while ( $url ) {
        $response = $this->request( $url );
        $data = array_merge( $data, $response->data );
        // if this is not the last page, get the next page URL
        if ( $response->paginator->current_page != $response->paginator->last_page ) {
            $url = $response->paginator->next_page;
        } else {$url = false;}
    }
    return $data;