How to Hide AIP: Complete AI Pack (formerly AI Power) Admin Menus

function plt_hide_gpt3_ai_content_generator_menus() {
	//Hide "AIP".
	remove_menu_page('wpaicg');
	//Hide "AIP → Dashboard".
	remove_submenu_page('wpaicg', 'wpaicg');
	//Hide "AIP → Role Manager".
	remove_submenu_page('wpaicg', 'aipkit-role-manager');
	//Hide "AIP → Contact Us".
	remove_submenu_page('wpaicg', 'wpaicg-contact');
	//Hide "AIP → Upgrade".
	remove_submenu_page('wpaicg', 'wpaicg-pricing');
}

add_action('admin_menu', 'plt_hide_gpt3_ai_content_generator_menus', 1000000000);

Where do I put this code?