These instructions will only work if you already have 2-Step Verification enabled via a security key or app. If you want to tackle this first, please reach out to support@teamhelp.org
Pro Tip: Fore more security, don't store all of your backup codes together, and don't store them with the email address or account they're associated with.
Now, whenever you try to log in to Google and it asks you for a backup code, just enter one of your unused codes.
Make sure to delete or check off the code you use so that you don't try to reuse it. Each code only works once!