created bacis structure and routes for creating user and logging in

backend/controllers/userController.js

@@ -0,0 +1,78 @@
+const asyncHandler = require("express-async-handler");
+const bcrypt = require("bcryptjs");
+const jwt = require("jsonwebtoken");
+const User = require("../models/userModel");
+
+// @desc Register a new user
+// @route /api/users
+// @access Public
+const registerUser = asyncHandler(async (req, res) => {
+  const { name, email, password } = req.body;
+  if (!name || !email || !password) {
+    res.status(400);
+    throw new Error("Please include all fields");
+  }
+  const userExists = await User.findOne({ email });
+
+  if (userExists) {
+    res.status(400);
+    throw new Error("User already exists");
+  }
+  const salt = await bcrypt.genSalt(10);
+  const hashedPassword = await bcrypt.hash(password, salt);
+  const user = await User.create({
+    name,
+    email,
+    password: hashedPassword,
+  });
+
+  if (user) {
+    res.status(201).json({
+      _id: user._id,
+      name: user.name,
+      email: user.email,
+      token: generateToken(user._id),
+    });
+  } else {
+    res.status(400);
+    throw new error("Inavalid user data");
+  }
+});
+
+// @desc Login a user
+// @route /api/users/login
+// @access Public
+const loginUser = asyncHandler(async (req, res) => {
+  const { email, password } = req.body;
+
+  const user = await User.findOne({ email });
+  if (user && (await bcrypt.compare(password, user.password))) {
+    res.status(200).json({
+      _id: user._id,
+      name: user.name,
+      email: user.email,
+      token: generateToken(user._id),
+    });
+  } else {
+    res.status(401);
+    throw new Error("Inavalid credentials");
+  }
+});
+// @desc Get current user
+// @route /api/users/me
+// @access Private
+const getMe = asyncHandler(async (req, res) => {
+  const user = {
+    id:req.user._id,
+    email:req.user.email,
+    name:req.user.name
+  }
+  res.status(200).json(user)
+});
+const generateToken = (id) => {
+  return jwt.sign({ id }, process.env.JWT_SECRET, {
+    expiresIn: "30d",
+  });
+};
+
+module.exports = { registerUser, getMe, loginUser };