Redirecting already logged-in users to wp-admin

First of all, thanks for creating this plugin 🙂 One thing that I would like to see in the plugin is feature that redirects already logged-in users to wp-admin when they go to custom login page.

Made for my theme short action to login_head that redirects user. Do you see any harm using this?

/*
 * Redirect login page loads to wp-admin if user is already logged in
 *
 */

add_action( 'login_head', 'redirect_to_admin',1);
function redirect_to_admin(){
	if(is_user_logged_in()){
		wp_redirect(admin_url());
	}
}

https://wordpress.org/plugins/rename-wp-login/