My freeCodeCamp.org - Back End Development and APIs Final Project.
Create a New User: POST /api/users/
username
Add exercises POST /api/users/:_id/exercises/
:_id
description
duration (mins.)
date (yyyy-mm-dd)
GET user's exercise log:
GET /api/users/:_id/logs?[from][&to][&limit]
[ ] = optional
from, to = dates (yyyy-mm-dd); limit = number