我试图在我的express应用程序中添加一个路由到“/signup”。但是，每次我向服务器发送post请求时，它都被解析为“无响应”。而“/”路由是有效的。我的代码哪里出了问题？
index.js

import dotenv from "dotenv";
import cors from "cors";
import morgan from "morgan";
import dbConnect from "./config/dbConnect.js";
import { authRoute } from "./routes/auth.js";

dotenv.config();
const port = process.env.PORT;
const DATABASE_URI = process.env.DATABASE_URI;
const app = express();

dbConnect();

app.get("/", (req, res) => {
    res.sendStatus(200);
});

app.use(express.json());
app.use(cors());
app.use(morgan("combined"));

app.use("/api/v1", authRoute);

app.listen(port, () => {
    console.log(`Server running at ${port}...`);
});

auth.js

import { Router } from "express";

const router = Router();

router.post("signup", (req, res) => {
    const password = req.body.password;
    console.log(password);
});

export { router as authRoute };

dbConnect.js

import mongoose from "mongoose";
import dotenv from "dotenv";

dotenv.config();

const DATABASE_URI = process.env.DATABASE_URI;

const dbConnect = () => {
    mongoose.set("strictQuery", false);
    mongoose
        .connect(DATABASE_URI)
        .then(() => {
            console.log("connected");
        })
        .catch((error) => {
            console.error(error);
        });
};

export default dbConnect;

我正在使用Postman发送URL编码的表单数据进行测试。但是服务器返回“无响应”