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Amazon Cognito
Developer Guide

Amazon Cognito User Pools Auth API Reference

Amazon Cognito User Pools support the OAuth 2.0 authorization framework for authenticating users. Once a domain has been configured for the your user pool, the Amazon Cognito service automatically provisions a hosted web UI that allows you to add sign-up and sign-in pages to your app. For more information see Step 2. Add an App to Enable the Hosted Web UI (Optional).

This section contains the HTTPS contract to the Amazon Cognito authentication server from a user pool client, including sample requests and responses. It describes the expected behavior from the authentication server for positive and negative conditions.

In addition to the server contract REST API, Amazon Cognito also provides Auth SDKs for Android, iOS, and JavaScript that make it easier to form requests and interact with the server.