Create fake auth middleware

Work in progress

server/src/middleware/auth.js

@@ -0,0 +1,19 @@
+/* eslint-disable import/prefer-default-export */
+import User from '../models/user.js'
+
+export async function authMiddleware(req, res, next) {
+  try {
+    let user = await User.findOne({ username: 'defaultUser' })
+    if (!user) {
+      user = new User({
+        username: 'defaultUser',
+        email: 'john@example.com',
+      })
+      await user.save()
+    }
+    req.user = user
+    next()
+  } catch (err) {
+    res.status(500).json({ message: err.message })
+  }
+}