How to Generate JWT Token with Signup API - Node JS, Express JS

 // install dependency  jwt using command npm install jsonwebtoken at your folder terminal 

// import it in your app.js 

// Use this code in file in which you are saving user to database or you are receiving result of successfully registered user . in my case am getting result from Indexcontroller (You can make your own controller to save data) 

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 //API to register new User with jWT Token

import jwt from 'jsonwebtoken'; 

router.post("/register",(req,res)=>{

    IndexController.registerUser(req.body).then((result)=>{  

         let jwttoken; 

     jwttoken = jwt.sign({ _id: result._id, email: result.email },"8Zzvasu5tw0Ionm3XPZZfN0NOml3z9FMfmpgXwovR9fp6ryDIoGRM8EPHAB6iHsc0fb",{ expiresIn: "1h" });

    res.status(201).json({success: true,data: { _id: result._id, email: result.email, jwttoken:jwttoken }});      

 }).catch((err)=>{

      return res.status(401).send(err);

 });

});

Now open Postman & Test This API - 

your if your API test is success your result will be look like following-