‘approve’ is deprecated

I have included this code to automatically approve users per this documentation: https://docs.ultimatemember.com/article/1650-auto-approve-a-user-on-registration-in-wp-admin

add_action("um_registration_complete","um_120621_wpadmin_approve_register_user");
function um_120621_wpadmin_approve_register_user( $user_id ){

    if( is_admin() ){
        um_fetch_user( $user_id );
		UM()->user()->approve();
	}
}

When I view my local version of the site in Visual Studio Code, I get a message that ‘approve’ is deprecated.

I would like to update this code to use the current method, but can’t figure out what that is. Can someone point me to the where this is documented?

Thanks!