Threads API endpoints for creating a new user, creating a thread, and retrieving a list of all threads

Express_endpoints.js

const express = require('express');
const app = express();
app.use(express.json());
app.use(function(req, res, next) {
  console.log(new Date(), req.method, req.url);
  next();
});

const threads = [];
const users = [];

// Get all threads
app.get('/threads', function(req, res) {
  res.json({ threads });
});

// Create a new user
app.post('/users', async function(req, res) {
  if (req.body.id == null) {
    throw new Error('User must have an id');
  }
  if (users.find(user => user.id === req.body.id)) {
    throw new Error(`Duplicate user id ${req.body.id}`);
  }
  const user = {
    name: 'John Smith',
    banned: false,
    roles: [],
    ...req.body
  };
  users.push(user);

  res.json({ user });
});

// Create a new thread
app.post('/threads', async function(req, res) {
  if (req.body.id == null) {
    throw new Error('Thread must have an id');
  }
  if (threads.find(thread => thread.id === req.body.id)) {
    throw new Error(`Duplicate thread id ${req.body.id}`);
  }
  const thread = {
    title: null,
    comments: [],
    locked: false,
    userId: req.headers.authorization,
    ...req.body
  };
  threads.push(thread);
  res.json({ thread });
});