How do I stop Steam from asking for verification code?
If you are trying to enter an authenticator code and receiving an error, check the time on your phone and make sure it is accurate. The authenticator codes are generated using the phone's time, and if the time is off, the codes will be incorrect.
How do I fix my Steam guard code?
Depending on your Steam Guard settings, you'll either receive an email with the special code or you'll get it from the Steam Mobile app on your smartphone.
Where can I find my Steam Guard code?
Even though Steam instantly sends the Steam Guard code email, you may encounter a delay with some email providers depending on their server load and processing times. If you haven't received your code after thirty minutes, please attempt to log in again to receive a new Steam Guard code.