public interface IMovieService
{
    IEnumerable<Movie> GetAllMovies();

    Movie GetMovieById(string id);

    void UpdateMovie(string movieId, Movie movie);

    void DeleteMovie(Movie movieToDelete);

    string AddMovie(Movie movie);
    IEnumerable<Actor> GetAllActors(); 

    Actor GetActorById(string id);

    void UpdateActor(string id, Actor actor);

    void DeleteActor(Actor actorToDelete);

    string AddActor(Actor actor);

    IEnumerable<Theater> GetAllTheaters();

    IEnumerable<User> GetAllUsers();
}