I opened the email, I saw the code, now I’m in TestFlight and the code is gone?

The code can be accessed by referring to the website with the TestFlight instructions again. The way to arrive at this website is:

1. Open the email from TestFlight, and click on the button “View in TestFlight”. This will open a browser window with instructions. The code will be included here.
2. Copy the code (paste it somewhere safe and readily accessible for you to refer to it later)
3. Open TestFlight, and click on Redeem. Enter the copied code and this will start the download of the Duelit app.