/api/groups and /api/invites refactored, fixed some inserts/updates in which I didn't include the id

src/pages/api/evaluate/writing.ts

@@ -39,7 +39,8 @@ async function handler(req: NextApiRequest, res: NextApiResponse) {
 	const solutions = correspondingStat.solutions.map((x) => ({...x, evaluation: backendRequest.data}));
 	await db.collection("stats").updateOne(
 		{ id: (req.body as Body).id},
-		{
+		{	
+			id: (req.body as Body).id,
 			solutions,
 			score: {
 				correct: writingReverseMarking[backendRequest.data.overall],
@@ -58,7 +59,7 @@ async function getCorrespondingStat(id: string, index: number): Promise<Stat> {
 	const correspondingStat = await db.collection("stats").findOne<Stat>({ id: id});
 
 	if (correspondingStat) return correspondingStat;
-	
+
 	await delay(3 * 10000);
 	return getCorrespondingStat(id, index + 1);
 }