Users should not have access to other users' private recipes

[anthonyliuhao]

Summary

Users should not have access to other users' private recipes

Steps to reproduce

1. Register and login
2. Use the build a recipe feature to create and save a recipe
3. Go to My Recipes, and then go to the recipe that was just saved
4. Copy the URL (for example http://localhost:3000/recipe?id=10)
5. Log out
6. Manually paste the URL http://localhost:3000/recipe?id=10 into your browser's search bar, and press enter

Observed Result

Even though I have logged out, I can still access the private recipe.

Expected Result

There should be an alert or error to say that I don't have access if I try to view a private recipe of another user.