Customise the WordPress login url

/**
 * Customize the login URL of your website
 * Paste this into your active theme's function.php file
 * @param string $login_url
 * @param string $redirect
 * @return string
 */
add_filter( 'login_url', function( $login_url, $redirect ) {
    if( is_admin() ) {
        return $login_url;
    }
    // Change this to your own login URL path
    $custom_login_path = 'custom-login-page';
    $login_url = site_url( $custom_login_path, 'login' );
    if( !empty( $redirect )) {
        $login_url = add_query_arg( 'redirect_to', urlencode( $redirect ), $login_url );
    }
    return $login_url;
}, 10, 2 );