/api/v1/books - return all books
/api/v1/books/{id} - return a single book
/api/v1/authors - return all authors
/api/v1/authors/{id} - return a single author
/api/v1/categories - return all categories
/api/v1/categories/{id} - return a single category
/api/v1/users - return all users
/api/v1/users/{id} - return a single user
/api/v1/books - post a new book
/api/v1/authors - post a new author
/api/v1/categories - post a new categorie
/api/v1/users - post a new user
/api/v1/books/{id} - update a book by Id
/api/v1/authors/{id} - update a author by Id
/api/v1/categories/{id} - update a categorie by Id
/api/v1/users/{id} - update a user by Id
/api/v1/books/{id} - delete a book by Id
/api/v1/authors/{id} - delete a author by Id
/api/v1/categories/{id} - delete a categorie by Id
/api/v1/users/{id} - delete a user by Id