[![Run on Repl.it](https://repl.it/badge/github/freeCodeCamp/boilerplate-project-exercisetracker)](https://repl.it/github/freeCodeCamp/boilerplate-project-exercisetracker)
3. I can add an exercise to any user by posting form data userId(_id), description, duration, and optionally date to /api/exercise/add. If no date supplied it will use current date. Returned will be the user object with also with the exercise fields added.
4. I can retrieve a full exercise log of any user by getting /api/exercise/log with a parameter of userId(_id). Return will be the user object with added array log and count (total exercise count).
5. I can retrieve part of the log of any user by also passing along optional parameters of from & to or limit. (Date format yyyy-mm-dd, limit = int)