GET http://localhost:5000/booksIdea/show 403 (Forbidden)

我检查了网站https://jwt.io/中的令牌，但我的签名无效，因此我想为什么会出现此问题，但我忽略了解决方法 我搜索了此错误，这就是我发现的结果：服务器收到403响应，告诉您：“对不起。我知道您是谁-我相信您说的是谁-但您只是没有访问此资源的权限。如果您很好地询问系统管理员，您可能会获得许可。但是请不要再困扰我，直到您的困境改变为止。”

前端的API GET功能：

import axios from 'axios'

export const ShowBooks = () => {
    let token = localStorage.getItem("usertoken")

    return axios.get("http://localhost:5000/booksIdea/show",{
        headers: {
          Authorization: `Bearer ${token}`,//here remove + in template litereal
        },})
      .then(res => {
          console.log("Success")
      })
      .catch(error => {
        console.log(error)
      })

}

后端app.js

const express = require('express')
var cookieParser = require('cookie-parser')
const app = express()
var cors = require('cors')
var bodyParser = require('body-parser')
const port = 5000
const routes = require("./routes");
const con = require('./db')
var cors = require('cors')
app.use(cors())
// database connect 

con.connect(function(err) {
    if (err) throw err;
    console.log("Connected!");
  });

  //cookie 
  app.use(cookieParser())
//routes
// support parsing of application/json type post data
app.use(bodyParser.json());

//support parsing of application/x-www-form-urlencoded post data
app.use(bodyParser.urlencoded({ extended: true }));

app.use("/",routes);


app.listen(port,() => console.log(`Example app listening on port ${port}!`))

这是路线

var express = require('express')
var router = express.Router()
var Controller = require('./controller')
var authController = require('./authController')
var BooksIdeaController = require('./BooksIdeaController')
router.post('/register',Controller.register);
router.post('/login',authController.login);
router.post('/booksIdea/:id',authController.verify,BooksIdeaController.addComment)
router.post('/booksIdea/addbook',BooksIdeaController.addBookIdea)
router.get('/booksIdea/show',BooksIdeaController.showBookIdea)
router.put('/booksIdea/edit/:id',BooksIdeaController.UpdateBookIdea)
router.delete('/booksIdea/delete/:id',BooksIdeaController.DeleteBookIdea)
module.exports = router;

  

authController

const con = require('./db');
var bcrypt = require('bcrypt');
let jwt = require('jsonwebtoken');
const express = require('express')
var cookieParser = require('cookie-parser')
const app = express()
module.exports.login=function(req,res){
    var username=req.body.name;
    var password=req.body.password;
    con.query('SELECT * FROM users WHERE username = ?',[username],function (error,results,fields) {
      if (error) {
          res.json({
            status:false,message:'there are some error with query'
            })
      }else{
        if(results.length >0){
          bcrypt.compare(password,results[0].password,function (err,result) {
            if (result == true) {
        jwt.sign({user:results},'configSecret',(err,token)=>{
          res.json({
            token:token
          })


        });



            //   res.json({
            //     status:true,//     message:'successfully authenticated'
            // })
            } else {
              res.json({
                      status:false,message:"username and password does not match"
                     });
            }
          });
        }
        else{
          res.json({
              status:false,message:"username does not exits"
          });
        }
      }
    });
}

module.exports.home=function(req,res){
res.send('hello');
}
//////
// if(password==results[0].password){

  // }else{
  //    
  // }
  module.exports.verify = function verifyToken(req,res,next) {
    // Get auth header value
    const bearerHeader = req.headers['authorization'];
    // Check if bearer is undefined
    if(typeof bearerHeader !== 'undefined') {
      // Split at the space
      const bearer = bearerHeader.split(' ');
      // Get token from array
      const bearerToken = bearer[1];
      // Set the token
      req.token = bearerToken;
      // Next middleware
      next();
    } else {
      // Forbidden
      res.sendStatus(403);
    }

  }

如何解决此错误？预先感谢您的帮助