The API's endpoints documentation can be accessed through:
http://127.0.0.1:8000/
The project allows creation of Users for authentication, Books, BookUnits, Authors and Rentals.
A Book has none, one or many authors, and can have multiple BooksUnits.
A Rental has a BookUnit, as well as the rental and return dates, and the User information.
To populate the database use:
python manage.py populate