First time Nodejs issue - node.js

Question

I am new in Nodejs. I am using Node.js first time. I am trying to integrate a Nodejs API with React.js application. I don't know why this error is coming. My files are like below.
index.js
import express from 'express';
import path from 'path';
import mongoose from 'mongoose';
import bodyParser from 'body-parser';
import auth from "./routes/auth";
const app = express();
app.use(bodyParser.json());
mongoose.connect('mongodb://127.0.0.1:8080/bookworm', { useNewUrlParser: true });
app.use("/api/auth", auth);
app.get('/*',(req,res)=> {
res.sendFile(path.join(__dirname,'index.html'));
});
app.listen(8080, ()=> console.log("Running on localhost:8080"));
auth.js
import express from 'express';
import User from '../models/User';
const router = express.Router();
router.post("/", (req,res) => {
const { credentials } = req.body;
User.findOne({ email: credentials.email }).then(user => {
if (user) {
} else {
res.status(400).json({errors: { global: "Invalid creadentials"}})
}
});
});
export default router;
User.js
import mongoose from 'mongoose';
const schema = new mongoose.Schema(
{
email: { type: String, required: true, lowercase: true, index: true },
passwordHash: { type: String, required: true }
},
{ timestamps: true }
);
export default mongoose.model('User', schema);
I am getting error like below
What is the solution ?

Answer 1

Try this:
User.findOne({ email: credentials.email })
.then(user => {
if(!user){
res.status(400).send({errors: { global: "Invalid creadentials"}});
} else {
res.status(200).send({user});
}
})
.catch(errors => {
res.status(400).send({errors: { global: errors.message }});
})
According to the error messages, I just added the catch() method to handle the promise rejection.