Err: Cannot POST /api/success - node.js

Question

I am trying to send a POST request but it seems like the route isn't working based off the error. However, I get the value of req.body.entries logged in my console so it has to be working. When I send a GET request the browser sits and loads. The same thing happens in Postman. I am trying to figure out why I get an error on the POST request and the GET request sits. Thank you in advance.
index.js
const successRoute = require("./routes/success");
app.use("/api/success", successRoute);
success.js
router.get(
"/",
basicAuth({
users: { username: "password" },
}),
async function (req, res) {
try {
const entry = await Entry.find({});
res.sendStatus(entry);
} catch (err) {
res.sendStatus({ msg: "oops something went wrong" });
}
}
);
router.post("/", async (req, res, next) => {
try {
//console.log(req.body);
const { store, entries } = req.body;
Entry.findOneAndUpdate(
{ _id: store },
{ $set: { entries: +req.body.entries } },
{ new: true },
(err, doc) => {
if (err) {
console.log(err);
}
console.log(req.body.entries);
next();
}
);
} catch (err) {
const entry = new Entry({
_id: store,
entries: req.body.entries,
});
await entry.save();
res.sendStatus(200);
next();
}
});

Answer 1

I think the problem is, inside your router.post(), you're not sending any response, you only call next(). I don't see any next route for the request.
I'd recommend something like this:
router.post("/", async (req, res, next) => {
try {
//console.log(req.body);
const { store, entries } = req.body;
Entry.findOneAndUpdate(
{ _id: store },
{ $set: { entries: +req.body.entries } },
{ new: true },
(err, doc) => {
// throw the error and catch later
if (err)
throw err;
console.log(req.body.entries);
// send response instead of calling next()
res.sendStatus(200);
}
);
} catch (err) {
const entry = new Entry({
_id: store,
entries: req.body.entries,
});
await entry.save();
// send response
res.sendStatus(200);
// next(); // don't call next unless next route defined
}
});