Amazon Cognito now supports importing users with password hashes

Amazon Cognito now supports importing users with password hashes in CSV user imports. Previously, users imported from a CSV file had to reset their passwords on first sign-in. Now, you can include password hashes in your CSV file so that imported users can sign in immediately with their existing credentials. When creating a CSV import, you specify the password hashing algorithm used by your source system. Amazon Cognito imports these users and verifies their password against the imported hash on first sign-in. Supported algorithms include bcrypt, scrypt, Argon2id, and PBKDF2 with SHA-256\. All imported hashes receive an additional layer of cryptographic protection before storage. Password hash import is available in all AWS Regions where Amazon Cognito is available. To get started, create a user import using the [AWS Management Console](https://console.aws.amazon.com/cognito/home), AWS Command Line Interface (CLI), or AWS Software Development Kits (SDKs). See the [developer guide](https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-using-import-tool.html) for instructions.