add user email on account created page

app/controllers/users_controller.rb

@@ -338,6 +338,11 @@ class UsersController < ApplicationController
   end
 
   def account_created
+    params.require(:username)
+    @user = User.find_by_username_or_email(params[:username].to_s)
+
+    raise Discourse::NotFound unless @user
+
     expires_now
     render layout: 'no_js'
   end