open Err
open Types

val find_user : user_id -> user option result

val find_user_of_nick : v_string -> user option result

val find_user_of_email : v_string -> user option result

val find_user_private : user_id -> User_private.t option result

val get_password_hash : user_id -> string result

val update_password_hash : user_id -> string -> unit result

val update_nick : user_id -> v_string -> unit result

val update_bio : user_id -> v_string -> unit result

val update_email : user_id -> v_string -> unit result

val delete_user : user_id -> unit result

val add_user :
  email:v_string -> nick:v_string -> password_hash:string -> unit result