/books : get all books
/bookById/{id} : get book by id
/book/{name} : get book by name
/books/{genre} : get list of books by genre
/addBook : add a book
/addBooks : add multiple books
/update : update a book
/delete/{id} : delete a book by id
/reviews/{book} : gets list of reviews for a book
/review/{date} : gets list of reviews from a certain day
/addReview : adds a review
/addUser : adds a user
/userSaved/{user}/{book} : get user by username and book
/userSaved : get list of all saved books by all users
/userSaves/{user} : get list of books saved by a certain user
/addUserSave : add a user saved book
/deleteById/{id} : delete a user saved book by id