This feature makes it easy for developers to add user sign-up, sign-in, and enhanced security functionality to their mobile and web apps. With User Pools, you get a simple, fully managed service for creating and maintaining your own user directory that can scale to hundreds of millions of users. You benefit from the security and privacy best practices of AWS, and retain full control of your user data. This feature is now available in the following AWS Regions: US East (N. Virginia), US West (Oregon), Asia Pacific (Tokyo), and EU (Ireland).