Added user sign up and login.

src/web/auth.js

@@ -0,0 +1,45 @@
+'use strict';
+
+const { login, signup } = require('../auth');
+const { fetchUser } = require('../users');
+
+async function loginApi(req, res) {
+	const user = await login(req.body);
+
+	req.session.user = user;
+	res.send(user);
+}
+
+async function logoutApi(req, res) {
+	req.session.destroy((error) => {
+		if (error) {
+			res.status(500).send();
+		}
+
+		res.status(204).send();
+	});
+}
+
+async function fetchMeApi(req, res) {
+	if (req.session.user) {
+		req.session.user = await fetchUser(req.session.user.id, req.session.user);
+
+		res.send(req.session.user);
+		return;
+	}
+
+	res.status(401).send();
+}
+
+async function signupApi(req, res) {
+	const user = await signup(req.body);
+
+	res.send(user);
+}
+
+module.exports = {
+	login: loginApi,
+	logout: logoutApi,
+	fetchMe: fetchMeApi,
+	signup: signupApi,
+};