Can't get vite server proxy working

[Plus3531]

I try to proxy request to backend server in vite.config.ts:

import {defineConfig} from '@solidjs/start/config';

export default defineConfig({
    vite: {
        server: {
            proxy: {
                "/api": {
                    target: "http://backend.some.lan/appel/api/Login",
                    changeOrigin: true,
                    secure: false,
                },
            },
        },
    }
});

But when I try fetch like so:

 const myHeaders = new Headers();
    myHeaders.append("Content-Type", "application/json");

    const response = await fetch("/api/Login", {
        method: "POST",
        body: JSON.stringify({username: "myBaby", password: "burp"}),
        headers: myHeaders,
    });

the request is not proxied to http://backend.some.lan/appel/api/Login but in browsers network tab I see
POST | http://localhost:3000/api/Login

What is wrong with this code?

[Plus3531]

I got it working now, url was wrong and proxy was not configured well.