router unique validation for mongoose
router.post("/register", async (req, res) => {
try {
const { email, password } = req.body;
let user = await User.findOne({ email });
if (user) return res.status(400).send("User already registered.");
user = new User({ email, password });
user.password = await bcrypt.hash(user.password, 10);
await user.save();
res.send("registered");
} catch (err) {
console.log(err);
res.status(500).send("Something went wrong");
}
});