* TODO Users must be able to create an account
* TODO Users must verify their account by email
* TODO Support federated login with Google
* TODO Users must be able to authenticate and login
* TODO Define three roles: user, manager, admin
* TODO Users can add trips
* TODO Users can edit trips
* TODO Users can delete trips
* TODO Users can filter trips
* TODO Support all actions via the REST API
* TODO Block users after three failed authentication attempts
* TODO Only admins and managers can unblock blocked login attempts
* TODO Add unit tests
* TODO Add E2E tests
* TODO Pull user profile pictures using Gravatar
* TODO Allow users to change their profile picture
* TODO Admins should be allowed to invite new users via email
* TODO Allow users to print their travel itineraries