umami/pages/api/users/index.js

import { ok, unauthorized, methodNotAllowed, badRequest, hashPassword } from 'next-basics';
import { useAuth } from 'lib/middleware';
import { uuid } from 'lib/crypto';
import { createUser, getUser, getUsers } from 'queries';

export default async (req, res) => {
  await useAuth(req, res);

  const { isAdmin } = req.auth.user;

  if (!isAdmin) {
    return unauthorized(res);
  }

  if (req.method === 'GET') {
    const users = await getUsers();

    return ok(res, users);
  }

  if (req.method === 'POST') {
    const { username, password } = req.body;

    const user = await getUser({ username });

    if (user) {
      return badRequest(res, 'User already exists');
    }

    const created = await createUser({
      id: uuid(),
      username,
      password: hashPassword(password),
    });

    return ok(res, created);
  }

  return methodNotAllowed(res);
};