How Can I go back to view my AARP reward code when I play the game?

[ASmith9597]

I just finished play 3 games of Sudoku. The message popped up for the 300 points with the code.

Then when I tried to click on the code to COPY and Paste on the AARP rewards website it did not save. 

How can I go back to view my AARP reward code when I play the game?

(The code was too long to memorize.)