如何在本机使用中从数据库中获取数据？

如何解决如何在本机使用中从数据库中获取数据？

我正在制作一个博览会 MERN 应用程序，在登录组件中，当用户单击登录按钮并验证/检查该用户电子邮件和密码是否存在于数据库中时，我试图从数据库中获取数据或不。我正在使用快速路由器并尝试在 axios 中获取数据。但问题是它给出了一个错误“错误：请求失败，状态码为 404”。下面是我的代码：

routeSignIn.js

const express = require("express");
const router = express.Router();
const User = require("../models/User");

router.get("/",async (req,res) => {
  try {
    const getUser = await User.find();
    res.json(getUser);
  } catch (err) {
    res.send("Error: " + err);
  }
});

module.exports = router;

Server.js

const express = require("express");
const app = express();
const mongoose = require("mongoose");

const url = "mongodb://localhost/my-project1";

mongoose.connect(url,{ useNewUrlParser: true });

const con = mongoose.connection;

app.use(express.json());

const routeSignIn = require("../route/routeSignIn");
app.use("/getUser",routeSignIn);

con.on("open",() => {
  console.log("Database is connected...");
});

const server = app.listen(3000,() => {
  const { address,port } = server.address();
  console.log(`Server started. Listening at 
http://${address}:${port}`);
});

登录.js

const [data,setData] = useState({
    email: "",password: "",});
const loginHandle = (email,password) => {

//I believe this is where the problem is
const foundUser = () => {     
  axios
    .get("http://192.168.29.7:3000/getUser")
    .then((res) => {
      console.log(res);
      setData({
        email: res.email,password: res.password,});
    })
    .catch((err) => {
      console.log("Error fetching data: ",err);
    });
  return email == email && password == password;
};
if (data.email.length == 0 || data.password.length == 0) {
  Alert.alert("Email or password field cannot be empty.");
  return;
}
if (foundUser().length == 0) {
  Alert.alert("Invalid User,Username or password is incorrect");
  return;
}
signIn(foundUser());
};

return(
<TouchableOpacity
        onPress={() => {
          loginHandle(data.email,data.password);
        }}
      >
)

App.js

const authContext = useMemo(
() => ({
  signIn: (foundUser) => {
    const userEmail = foundUser.email;
    dispatch({ type: "LOGIN",email: userEmail });
  },

上面代码中发生的事情是，当用户单击登录按钮时，loginhandle 函数（在 SignIn.js 中）被调用，数据将在一个名为 foundUser 的函数中获取，该函数将传递给 signIn (foundUser) 位于 useMemo 内的 apps.js 中... 非常感谢...