About built-in authentication
By default, GitHub Enterprise Server uses built-in authentication. Each person creates a user account on your GitHub Enterprise Server instance from an invitation or by signing up, and then authenticates with the credentials for the account to access your instance. Your GitHub Enterprise Server instance stores the authentication information for the account.
You can prevent unauthenticated people from creating new user accounts on your instance. For more information, see "Disabling unauthenticated sign-ups."
Alternatively, you can configure external authentication for your GitHub Enterprise Server instance. If you use external authentication, you must invite people to use your instance through your authentication provider. For more information, see "About authentication for your enterprise."
ビルトイン認証の設定
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From an administrative account on GitHub Enterprise Server, in the upper-right corner of any page, click .
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If you're not already on the "Site admin" page, in the upper-left corner, click Site admin.
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左のサイドバーでManagement Consoleをクリックしてください。
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左のサイドバーでAuthentication（認証）をクリックしてください。
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Built in authentication（ビルトイン認証）を選択してください。
2 要素認証
LDAPもしくはビルトイン認証を使っている場合、2要素認証がサポートされます。 Organizationの管理者は、メンバーに対して2要素認証の有効化を必須とすることができます。
Creating your account
Once your instance has been created, you'll need to create your own admin account.
http(s)://[hostname]/joinの"Create Admin Account（管理者アカウントの作成）"ページで、ユーザ名、パスワード、メールアドレスを選択し、Create an account（アカウントの作成）をクリックしてください。![[Create Admin Account]](/assets/cb-40755/images/enterprise/site-admin-settings/create-first-admin-acct.png)
http(s)://HOSTNAME/loginでyour GitHub Enterprise Server instanceにサインインしてください。
次のステップ
After you configure built-in authentication and create your administrative account, you can invite people to create accounts and use your instance. For more information, see "Inviting people to use your instance."