input: Write a python function to create a Book object with title and authors attributes, and verify their values.
  assert create_book('The Great Gatsby', 'F. Scott Fitzgerald').title == 'The Great Gatsby'
  assert create_book('The Great Gatsby', 'F. Scott Fitzgerald').authors == 'F. Scott Fitzgerald'
  assert create_book('1984', 'George Orwell').title == '1984'
  assert create_book('1984', 'George Orwell').authors == 'George Orwell'
output: class Book:
      def __init__(self, title, authors):
          self.title = title
          self.authors = authors
  
  def create_book(title, authors):
      return Book(title, authors)