Cognito
Cognito
Must be accessible from mobile, desktops, and tablets, and must remember user preferences across platforms
Supports unauthenticated access to users
provide the sign-up and sign-in functionality to end users with no AWS access
Embedded Files
You can add multi-factor authentication (MFA) to a user pool as second authentication method (SMS text messages, or time-based one-time (TOTP))
https://aws.amazon.com/premiumsupport/knowledge-center/cognito-user-pools-identity-pools/
Cognito Sync
Synchronize the user profile data across mobile devices
AWS AppSync
Similar to Cognito sync but it also allows multiple users to synchronize and collaborate shared data in real time
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