# Authentication

- [App-Specific API Keys](/guide/v6.9/getting-started/authentication/app-specific-api-keys.md)
- [Personal Access Tokens](/guide/v6.9/getting-started/authentication/personal-access-tokens.md)
- [Scopes](/guide/v6.9/getting-started/authentication/scopes.md)
- [Authorize](/guide/v6.9/getting-started/authentication/authorize.md)
- [SSO](/guide/v6.9/getting-started/authentication/sso.md)
- [2FA](/guide/v6.9/getting-started/authentication/2-factor-authentication.md)