JSON Web Token(JWT)

IT18021080/Telemedicine-Chat-App/backend/config/generateToken.js

+const jwt = require("jsonwebtoken");
+
+//create generatetoken function
+const generateToken = (id) => {
+    //add jwt secret from .env
+    return jwt.sign({ id }, process.env.JWT_SECRET, {
+        //can change the count of days as i want (secret days)
+        expiresIn: "30d",
+    });
+};
+
+module.exports = generateToken;
+
+//JWT use for pass user data to backend through JWT
\ No newline at end of file

IT18021080/Telemedicine-Chat-App/backend/controllers/userControllers.js

 const asyncHandler = require("express-async-handler");
 const User = require("../models/userModel");
+const generateToken = require("../config/generateToken");
 
 const registerUser = asyncHandler(async (req, res) => {
     const { name, email, password, pic } = req.body;
@@ -23,13 +24,14 @@ const registerUser = asyncHandler(async (req, res) => {
         password,
         pic,
     });
-
+//after register..also want send JWT token
     if (user) {
         res.status(201).json({
             _id: user._id,
             name: user.name,
             email: user.email,
             pic: user.pic,
+            token:generateToken(user._id),
         });
     } else {
         res.status(400);

IT18021080/Telemedicine-Chat-App/backend/server.js

@@ -12,7 +12,7 @@ dotenv.config();
 connectDB();
 const app = express();
 
-
+app.use(express.json()); //to accept JSON data 
 
 
 app.get("/", (req, res) => {