Cognito

Amazon Cognito provides support for authentication, authorization, and user management in applications as a service. It enables the user to log in securely with a login and password through third-party accounts, such as Facebook or Google, as well as through corporate identity providers, such as Microsoft Active Directory. This service includes the User Pool, i.e., a directory of users, and Identity Polls, which give the user access to other AWS services. It supports multi-factor authentication (tokens, SMS, e-mail) and registration.