Go to the website in question and start a log-in session, by typing in your e-mail in log in section (same e-mail as you signed up with)
A code will be sent to your e-mail. Double check your junkmail inbox if it does not appear within 5 minutes. The code is valid for 30 minutes, then you have to re-start a new log in session and receive a new code.
Copy the code and go back to your log in session, put the code in and go forward
You are now logged in
