This document discusses user management as a service (UMaaS) and Stormpath as an example provider. Some key benefits of UMaaS include lower costs, improved maintainability, and reduced complexity. Stormpath provides services for user authentication, profiles, roles, permissions, and social login integration. It uses a groups architecture with directories, groups, and accounts. The Stormpath PHP SDK makes integration easy but has limited functionality compared to the API. Useful SDK methods include account registration, email confirmation, authentication, and password resets.