BE: Prospects Model + API CRUD operations

[skassam21]

• one user will have many prospects
• prospects -> email, status (open, responded, unsubscribed), first name, last name
• The routes below are protected via JWT token (middleware or decorator):
  - API to get all prospects for a user
  - API route to create a list of prospects (think about the CSV import) for a user (takes a CSV file from a multi-form upload) - you will also need to consider mapping columns in the CSV to fields on the prospect model
  - API route to delete and update prospect

[skassam21]

Split this ticket into two PRs:

• prospects model + get, delete, update prospect
• jwt middleware, authentication
• create from a list of prospects (CSV uplaoding back-end)

[airensurzyn]

The scope of this Issue will be :

• Create an API model for Prospect
  prospects -> email, status (open, responded, unsubscribed), first name, last name

• Add Endpoints for Basic CRUD operations