this is my code and when I try to test the API with Postman it shows me cannot post in my URL

Cannot POST /course/addcourse

but the route is correct can u guys help me

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thank you for ur time guys

this is my controller :

const express = require('express');
const router = express.Router();
const Course = require('../models/course');
const multer = require('multer');

let cName = ''; // Variable to store the cover filename
let vNames = []; // Variable to store the video filename

const coverStorage = multer.diskStorage({
    destination: './uploads/img',
    filename: (req, file, callback) => {
        let date = Date.now();
        let filename = date + '.' + file.mimetype.split('/')[1];
        callback(null, filename);
        cName = filename; // Store the cover filename
    }
});

const videoStorage = multer.diskStorage({
    destination: './uploads/vid',
    filename: (req, file, callback) => {
        let date = Date.now();
        let filename = date + '.' + file.mimetype.split('/')[1];
        callback(null, filename);
        vNames.push(filename); // Store the video filename
    }
});

const uploadCover = multer({ storage: coverStorage }).single('cover');
const uploadVideo = multer({ storage: videoStorage }).array('videos');

router.post('/addcourse', (req, res) => {
    // Upload cover image
    console.log('api works fine')
    uploadCover(req, res, (err) => {
        if (err) {
            console.log('error in uploading image')
            return res.status(400).json({ success: false, error: err.message });
        }
        // Upload video
        uploadVideo(req, res, async (err) => {
            if (err) {
                console.log('error in uploading video')
                return res.status(400).json({ success: false, error: err.message });
            }
            try {
                let data = req.body;
                let course = new Course(data);
                course.cover = cName;
                course.videos = vNames.map(url => ({ url }))
                console.log(course);
                if(!course){
                    console.log('error in uploading all attribute')
                }
                await course.save();
                cName = ''; // Reset cover filename
                vNames = []; // Reset video filename
                res.status(200).json({ success: true, data: course });
            } catch (error) {
                res.status(400).json({ success: false, error: error.message });
            }
        });
    });
});

module.exports = router;

this is my model :

const mongoose = require('mongoose');

const videoSchema = new mongoose.Schema({
    title: {
        type: String
    },
    url: {
        type: String
    },
    // Add other properties as needed (e.g., duration)
});

const Course = mongoose.model('Course', {
    title: {
        type: String
    },
    idUser: {
        type: String
    },
    date: {
        type: Date,
        default: Date.now
    },
    visibility: {
        type: String,
        enum: ['public', 'private', 'shared'],
        default: 'public'
    },
    category: {
        type: String
    },
    videoN: {
        type: Number,
    },
    price: {
        type: String
    },
    cover: {
        type: String
    },
    videos: [videoSchema] // Array of videos
});

module.exports = Course;

                                                                                                                                                                                                

i try to get somecode from chatgpt and it doesn’t help me at all