Failed to load resource: the server responded with a status of 405 (Method Not Allowed)

I was tyring to send a POST request to node server. Server sedding me 405 status code. 

1//browser//
2const button = document.getElementById("button");
3const username = document.getElementById("username").value;
4const password = document.getElementById("password").value;
5let result;
6
7
8button.onclick = async function() {
9	result = await fetch("/app/login", {
10		method: "POST",
11		headers: {
12			"Contenty-type": "application/json"
13		},
14		body: JSON.stringify({
15			username,
16			password
17		})
18	}).then((e) == > console.log(e)) {})
19}

1//server//
2const http = require("http");
3
4const app = http.createServer(async(req, res, next)=>{
5    const postData = [];
6
7    if(req.url === "/api/login" && req.method === "POST"){
8    for await(const chunk of req){
9        postData.push(chunk)
10    } 
11    const {username, password} = JSON.parse(Buffer.concat(postData).toString());
12    if(!username){
13        res.write(JSON.stringify({message:"username must be write"}))
14    }else if(!password){
15        res.write(JSON.stringify({message:"password must be written"}))
16    }
17    else{
18        res.write(JSON.stringify({message:"account created"}))
19    }
20    console.log({username, password})
21}
22res.end();
23})
24
25app.listen(9966, ()=>{
26    console.log(9966)
27})