Updated it so it also appears to teachers

src/pages/api/users/list.ts

@@ -25,6 +25,13 @@ async function handler(req: NextApiRequest, res: NextApiResponse) {
 
 	if (!req.session.user) return res.status(200).json(users);
 	if (req.session.user.type === "admin" || req.session.user.type === "developer") return res.status(200).json(users);
+	if (req.session.user.type === "teacher") {
+		const adminGroups = await getGroupsForUser(req.session.user.id);
+		const belongingGroups = await getGroupsForUser(undefined, req.session.user.id);
+
+		const participants = uniq([...adminGroups.flatMap((x) => x.participants), ...belongingGroups.flat().flatMap((x) => x.participants)]);
+		return res.status(200).json(users.filter((x) => participants.includes(x.id)));
+	}
 
 	const adminGroups = await getGroupsForUser(req.session.user.id);
 	const groups = await Promise.all(adminGroups.flatMap((x) => x.participants).map(async (x) => await getGroupsForUser(x)));