[x] recommend the most rated movies if the user doesn't clicked or marked as watched
[ ] add a movie for movie_clicked history even if it is already added - somewhat problematic because ICollection doesn't allow two identical object (with the same key)
[x] recommend the most rated movies if the user doesn't clicked or marked as watched
[ ] add a movie for movie_clicked history even if it is already added - somewhat problematic because ICollection doesn't allow two identical object (with the same key)