You can set up your GitHub Enterprise account to require an authentication code in addition to your password when you sign in.
About Two-Factor Authentication
Two-factor authentication, or 2FA, is a way of logging into websites that requires more than just a password. Using a password to log into a website is susceptible to security threats, because it represents a single piece of information a malicious person needs to acquire. The added security that 2FA provides is requiring additional information to sign in.
Configuring two-factor authentication via a TOTP mobile app
A Time-based One-Time Password (TOTP) application automatically generates an authentication code that changes after a certain period of time.
Downloading your two-factor authentication recovery codes
After successfully setting up two-factor authentication via a TOTP mobile application , the Two-factor recovery codes (https://[hostname]/settings/auth/recovery-codes) page lists your valid recovery codes. We strongly recommend saving your recovery codes immediately. If you don't, though, you can download them at any point after enabling two-factor authentication.
Providing your 2FA authentication code
With 2FA enabled, you'll be asked to provide your 2FA authentication code, as well as your password, when you access GitHub Enterprise.
Recovering your account if you lost your 2FA credentials
Having access to your recovery codes in a secure place will get you back into your account.
