# [Introduction to Identity](identity.md)
# [Enabling authentication using Facebook, Google and other external providers](social/index.md)
## [Facebook authentication](social/facebook-logins.md)
## [Twitter authentication](social/twitter-logins.md)
## [Google authentication](social/google-logins.md)
## [Microsoft authentication](social/microsoft-logins.md)
## [Other authentication providers](social/other-logins.md)
# [Account Confirmation and Password Recovery](accconfirm.md)
# [Two-factor authentication with SMS](2fa.md)
# [🔧 Supporting Third Party Clients using OAuth 2.0](oauth2.md)
# [Using Cookie Middleware without ASP.NET Core Identity](cookie.md)
# [Azure Active Directory](azure-active-directory/toc.md)
# [Securing ASP.NET Core apps with IdentityServer4](https://identityserver4.readthedocs.io)