Implement a simple bookstore. If the user has an active subscription, he can view the book. There is a two-week trial period on registration. Then the user can buy a subscription for a month or a year.

API methods:

• POST create new user (the simplest manual creation, no need to bother with registration)
• GET list of users
• GET retrieve user
• POST pass the payment to the user (incoming data is {'user_id': '', status: 'ok', 'period': 'month/year'} or {'user_id': '', status: 'error', 'msg': ''})
• GET list of books to the user (subscription is not needed for that)
• GET retrieve detailed information about a certain book (subscription is required)

Stack: python 3, django, drf