routes.txt

# USER
  - login
    POST /api/user whatToDo = login

  - sign up
    POST /api/user whatToDo = signUp

  - mofify-user
    PATCH /api/user/user=<userId>

  - change-password
    POST /api/user whatToDo = request-change-password

  - get_user_by_id
    GET /api/user ?code

  - reset-password
    POST /api/user whatToDo = reset-password

  - forget-password
    POST /api/user whatToDo = forget-password


# CLIENT
  - get_all
  GET /api/client header and authentication

  - record new client
  POST /api/client client data + authentication

  - modify client's data
  PATCH /api/client new client's data + authentication


# CLOCKIN
  - punchin
  POST /api/clockin + auth + checking user, client, past clockins, and invoice

  - list clockins
  GET /api/clockin

  - remove
  DELETE /api/clockin + auth + clockinId


# INVOICE 
  - retrieve invoices
  GET /api/invoice

  - add new invoice
  POST /api/invoice

  - remove an invoice
  DELETE /api/invoice + auth + invoiceId

  - edit invoice
  PATCH

  - edit invoice status
  PATCH