Q:
access key?
Did you purchase the game online? If so, you should have an email (sent to your login email). Go check your email.
If you bought a physical copy, the code would be on the packaging, I’d imagine.
If there is no email and no code on the packaging, you’ll have to contact support. https://help.guildwars2.com/home
I’m not dead sure what you’re talking about but I has been almost 3 years so I guess there was an acceptance of terms procedure before first login. Try checking your email they sent you when you bought the game for the serial number.
Or perhaps post a screen shot. (Make sure it has no filled in log in information)