If you are attempting the quiz “Which Methods to Use?” in “Lesson 5: Authenticating Requests” (aka “Lesson 3”), don’t bother. The API has changed since the quiz was written and finding the old API is darn near impossible. I eventually had to get on “The Movie Database Support” website (after a long, round-about search of the internet) and find a support request that just happened to mention the genres method. For completists, here are the methods old and new:
Old (Quiz Answers)
/genre/{id}/movies
/account/{id}/favorite/movies
/account/{id}/favoriteNew (For Actual Use)
/genre/movie/list
/account/{account_id}/favorite/movies
/account/{account_id}/favorite