1. You can POST to /api/users with form data username to create a new user.

2. The returned response from POST /api/users with form data username will be an object with username and _id properties.

3. You can make a GET request to /api/users to get a list of all users.

4. The GET request to /api/users returns an array.

5. Each element in the array returned from GET /api/users is an object literal containing a user's username and _id.

6. You can POST to /api/users/:_id/exercises with form data description, duration, and optionally date. If no date is supplied, the current date will be used.

7. The response returned from POST /api/users/:_id/exercises will be the user object with the exercise fields added.

8. You can make a GET request to /api/users/:_id/logs to retrieve a full exercise log of any user.

9. A request to a user's log GET /api/users/:_id/logs returns a user object with a count property representing the number of exercises that belong to that user.

10. A GET request to /api/users/:_id/logs will return the user object with a log array of all the exercises added.

11. Each item in the log array that is returned from GET /api/users/:_id/logs is an object that should have a description, duration, and date properties.

12. The description property of any object in the log array that is returned from GET /api/users/:_id/logs should be a string.

13. The duration property of any object in the log array that is returned from GET /api/users/:_id/logs should be a number.

14. The date property of any object in the log array that is returned from GET /api/users/:_id/logs should be a string. Use the dateString format of the Date API.

15. You can add from, to and limit parameters to a GET /api/users/:_id/logs request to retrieve part of the log of any user. from and to are dates in yyyy-mm-dd format. limit is an integer of how many logs to send back.