Accounts :: Didn't Get Security Code During Update To 8.1

I just did the update from 8 to 8.1. One of the screens asked how I wanted to receive the security code.

I took the default option of a phone call.
I didn't get the call, so I changed it to the email option, and checked the email on another computer.
I didn't get the email either, so I clicked on "I can't do this right now".

So how do I get the code, and how do I do it later? Other than that it looks like the update went ok. I don't know why it came up with the system recover option turned off, and I had to change my setting so that I didn't have to enter a password at start up.