Updated the Group creation modal to use Excel

src/pages/(admin)/BatchCodeGenerator.tsx

@@ -38,7 +38,7 @@ export default function BatchCodeGenerator({user}: {user: User}) {
 
 	const {users} = useUsers();
 
-	const {openFilePicker, filesContent} = useFilePicker({
+	const {openFilePicker, filesContent, clear} = useFilePicker({
 		accept: ".xlsx",
 		multiple: false,
 		readAs: "ArrayBuffer",
@@ -74,10 +74,12 @@ export default function BatchCodeGenerator({user}: {user: User}) {
 					(x) => x.email,
 				);
 
-				if (information.length === 0)
-					return toast.error(
+				if (information.length === 0) {
+					toast.error(
 						"Please upload an Excel file containing user information, one per line! All already registered e-mails have also been ignored!",
 					);
+					return clear();
+				}
 
 				setInfos(information);
 			});