In the interaction tutorial, in the part dedicated to implement a user system, the tutorial makes use of Eliom_service.attach_post to create the connection service. The compiler (OCaml 4.04.2 with Eliom 6.2) can't find this symbol, and I didn't find any trace of a attach_post function in the code base or in recent and old APIs of Eliom. Am I missing something, or should attach_post be replaced by create_attached_post ?