👨‍💼 This will be really similar to the requireAnonymous utility you just made, except this one will do the opposite. It will be requireUserId and it should return the userId because we actually normally need that value.

Then you'll need to apply it to the loader and action of all the routes that require a user to be logged in.

In the case of actions, you'll likely need to get the userId and use that to perform the updates to the database. You'll find a few places we were using params.username to create/update/delete things. You'll need to change those to use the userId instead.

🐨 So start in and then move on to the other files in the files dropdown below.