use portal url also in test invite

app/controllers/users_controller.rb

@@ -36,7 +36,7 @@ class UsersController < ApplicationController
 
   # POST /rooms/1/users/1/test_invite
   def test_invite
-    url = join_room_url(@user.token)
+    url = user_elections_url(@user.token)
     RoomMailer.with(room_id: params[:room_id], user: @user, url: url).invite.deliver_now
     respond_to do |format|
       format.html { redirect_to room_users_url, notice: "Sent test invitation." }