i'd like to think that an easier way could be worked out  but the app does work as described. How many steps there are to complete the setup would be good information up front. For me  the first two codes too about 10 minutes to arrive. since I was expecting them immediately  I did the 3rd one  which worked. The one issue that I have is how to get to the message then back to the screen where it should be entered. I did it  but it was quite clumsy. It would be great if the code could show itself on the page that's already there. There are a couple of weak spots in either my understanding of how it's done or the coder's planning  but this is a well working app.
January 20 2016