You can turn off the extra security requirement. When you sign in, enter your wireless extra security passcode. Then, check Turn off extra security.
Or you can skip the wireless passcode requirement at sign-in if you have other accounts linked to your ID. Just check Skip passcode and don’t manage this account today to sign in. You’ll only be able to manage non-wireless accounts.
FYI: AT&T Fiber for Business can’t turn off the passcode requirement.