Registration response error in network tab

Hii I am trying to create a basic application with features of user registration and login

in that, I created node js + express server and connected mango db too here in the registration form user input details
like name email and password are displaying the server terminal

but

the network response showing error i am using cors also

my registration form code :`

import { useState } from "react";
function Register() {
const [name, setName] = useState('');
const [email, setEmail] = useState('');
const [password, setPassword] = useState('');
const [error, setError] = useState('');
async function Registeruser(event) {
event.preventDefault();
const response = await fetch('http://localhost:1337/api/register', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
name,
email,
password
})
});
const data = await response.json();
if (response.ok) {
// Registration successful
console.log('Registration successful');
} else {
// Registration failed
setError(data.error || 'An error occurred');
}
}
return (
<>
<div className="maindiv">
<h2>Register</h2>
<p></p>
<form onSubmit={Registeruser}>
<input
value={name}
onChange={(e) => setName(e.target.value)}
placeholder="Your Name"
/>
<p></p>
<input
value={email}
onChange={(e) => setEmail(e.target.value)}
placeholder="Email"
/>
<p></p>
<input
value={password}
onChange={(e) => setPassword(e.target.value)}
placeholder="Password"
/>
<br />
<input type="submit" value="Register" />
</form>
{error && <p className="error">{error}</p>}
</div>
</>
);
}
export default Register; 

and server index.js code

  const express = require('express');
const app = express();
const mongoose = require('mongoose');
const cors = require('cors');
const User = require('./models/user.model');
app.use(cors()); // Use the cors middleware
app.use(express.json());
mongoose.connect('mongodb+srv://ganeshnandhipati161999:Ganesh123%40%23%24@cluster1ganesh.n9trq4x.mongodb.net/test?retryWrites=true&w=majority', {
useNewUrlParser: true,
useUnifiedTopology: true,
})
app.post('/api/register', async (req, res) => {
console.log(req.body)
try {
await User.create({
name: req.body.name,
email: req.body.email,
password: newPassword,
})
res.json({ status: 'ok' });
} catch (err) {
res.json({ status: 'error', error: 'Duplicate email' })
}
})
app.post('/api/login', async (req, res) => {
const user = await User.findOne({
email: req.body.email,
password: req.body.password,
});
if (user) {
return res.json({ status: 'ok', user: true });
} else {
return res.json({ status: 'error', user: false });
}
});
app.listen(1337, () => {
console.log('Server started on 1337');
});   
```
why it showing like these 
I am expecting user registration and a successful registration and login and details will store in mongo db database    
</details>
# 答案1
**得分**: 1
如果您看到此代码的捕获块：
```javascript
app.post('/api/register', async (req, res) => {
console.log(req.body)
try {
await User.create({
name: req.body.name,
email: req.body.email,
password: newPassword,
})
res.json({ status: 'ok' });
} catch (err) {
res.json({ status: 'error', error: 'Duplicate email' })
}
})

在这里，您的代码进入了捕获块，在捕获块中，您正在发送响应。在这个响应中，您发送了消息 "Duplicate email"。

我建议您在捕获块中通过检查错误来检查错误以及您收到了什么错误，修复这个问题将解决您的问题。

app.post('/api/register', async (req, res) => {
console.log(req.body)
try {
await User.create({
name: req.body.name,
email: req.body.email,
password: newPassword,
})
res.json({ status: 'ok' });
} catch (err) {
res.json({ status: 'error', error: 'Duplicate email' })
}
})