Send and handle "Delete" activity for deleted users

lib/pleroma/user.ex

@@ -937,6 +937,8 @@ defmodule Pleroma.User do
 
   @spec perform(atom(), User.t()) :: {:ok, User.t()}
   def perform(:delete, %User{} = user) do
+    {:ok, _user} = ActivityPub.delete(user)
+
     # Remove all relationships
     {:ok, followers} = User.get_followers(user)
 
@@ -953,8 +955,8 @@ defmodule Pleroma.User do
     end)
 
     delete_user_activities(user)
-
-    {:ok, _user} = Repo.delete(user)
+    invalidate_cache(user)
+    Repo.delete(user)
   end
 
   @spec perform(atom(), User.t()) :: {:ok, User.t()}