Function validate

frontend/src/modals/AccessListModal.tsx:27–41

(values: any)

	const [isSubmitting, setIsSubmitting] = useState(false);

	const validate = (values: any): string | null => {
		// either Auths or Clients must be defined
		if (values.items?.length === 0 && values.clients?.length === 0) {
			return intl.formatMessage({ id: "error.access.at-least-one" });
		}

		// ensure the items don't contain the same username twice
		const usernames = values.items.map((i: any) => i.username);
		const uniqueUsernames = Array.from(new Set(usernames));
		if (usernames.length !== uniqueUsernames.length) {
			return intl.formatMessage({ id: "error.access.duplicate-usernames" });
		}

		return null;
	};

	const onSubmit = async (values: any, { setSubmitting }: any) => {
		if (isSubmitting) return;