WordPress Custom post login page

Solution:

If user is logged, he is redirect in ‘about us’ page

function my_login_redirect( $redirect_to, $request, $user ) {
    $redirect_to = get_page_link(ID_PAGE_ABOUT_US);
    return $redirect_to;
}
add_filter( 'login_redirect', 'my_login_redirect', 10, 3 );