Test your knowledge and understanding by working on the following tasks:

1. Extend the user service so that new users need to confirm their email first.
2. Save the last login time to a user's model.
3. Complete the address model by adding attributes such as Country, LAT, LNG,  and State.
4. Advanced: Write admin functions to allow an admin user (you have to define what that is) to edit another user's addresses and profile.