const BASE_URL = "http://localhost:3000/api"; export async function register(username) { const res = await fetch(`${BASE_URL}/user`, { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify({ username }) }); return res.json(); } export async function login(username, password) { const res = await fetch(`${BASE_URL}/user`, { method: "GET", headers: { "X-Username": username, "X-Password": password } }); return res.status === 201; }