According to movie-goers who were able to see Us before it premiered, there is no point in waiting in the theaters for the credits to end because there is no post-credit scene. 

Disappointed?  You can be like this fan and make up your own after-credits scene. "I watched a post credit scene of Us in my dream and listen... it was kinda spooky, it was kinda creepy. Loved it," they tweeted.