Tips on Customizing Members – Membership & User Role Editor Plugin

How to Hide Members Admin Menus

function plt_hide_members_menus() {
	//Hide "Members".
	remove_menu_page('members');
	//Hide "Members → Roles".
	remove_submenu_page('members', 'roles');
	//Hide "Members → Add New Role".
	remove_submenu_page('members', 'members');
	//Hide "Members → Settings".
	remove_submenu_page('members', 'members-settings');
	//Hide "Members → Add-Ons".
	remove_submenu_page('members', 'members-settings&view=add-ons');
	//Hide "Members → Payments".
	remove_submenu_page('members', 'members-payments');
	//Hide "Members → About Us".
	remove_submenu_page('members', 'members-about');
	//Hide "Members → Growth Tools".
	remove_submenu_page('members', 'members-growth-tools');
}

add_action('admin_menu', 'plt_hide_members_menus', 10000);

Where do I put this code?

How to Hide the "Content Permissions (Members)" Meta Box

function plt_hide_members_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Content Permissions (Members)" meta box.
	remove_meta_box('members-cp', $screen->id, 'advanced');
}

add_action('add_meta_boxes', 'plt_hide_members_metaboxes', 20);