How to Hide Tikex Payment and Invoice Integration Admin Menus

function plt_hide_tiket_payment_invoicing_menus() {
	//Hide "Tikex".
	remove_menu_page('tiket-on-wordpress');
	//Hide "Tikex → Tikex".
	remove_submenu_page('tiket-on-wordpress', 'tiket-on-wordpress');
	//Hide "Tikex → Bérletek".
	remove_submenu_page('tiket-on-wordpress', 'tiket-on-wordpress-passeseditor');
	//Hide "Tikex → Csapataim".
	remove_submenu_page('tiket-on-wordpress', 'tiket-on-wordpress-teams');
	//Hide "Tikex → Fordítások".
	remove_submenu_page('tiket-on-wordpress', 'tiket-on-wordpress-translationseditor');
	//Hide "Tikex → IdÅ‘pontok".
	remove_submenu_page('tiket-on-wordpress', 'tiket-on-wordpress-eventtimeseditor');
	//Hide "Tikex → Kedvezményezettek".
	remove_submenu_page('tiket-on-wordpress', 'tiket-on-wordpress-payeeseditor');
	//Hide "Tikex → Profil".
	remove_submenu_page('tiket-on-wordpress', 'tiket-on-wordpress');
	//Hide "Tikex → Termékek".
	remove_submenu_page('tiket-on-wordpress', 'tiket-on-wordpress-eventseditor');
	//Hide "Tikex → Å°rlapok".
	remove_submenu_page('tiket-on-wordpress', 'tiket-on-wordpress-formseditor');
	//Hide "Tikex → Vásárlások".
	remove_submenu_page('tiket-on-wordpress', 'tiket-on-wordpress-purchases');
}

add_action('admin_menu', 'plt_hide_tiket_payment_invoicing_menus', 11);

Where do I put this code?