Set the userId

πŸ‘¨β€πŸ’Ό Great! Now our server can determine who the user is just by inspecting the request's cookie header. Let's do that next.
πŸ§β€β™‚οΈ I'm going to do a little work in to make a nicer UI for the user once they're logged in. You'll still need to wire it up in the next step, but if you'd like to see what I'm doing, check out the diff.