A company needs to set up user authentication for a new application. Users must be able to sign in directly with a user name and password, or through a third- party provider. Which AWS service should the company use to meet these requirements?
Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. Amazon Cognito scales to millions of users and supports sign-in with social identity providers, such as Apple, Facebook, Google, and Amazon, and enterprise identity providers via SAML 2.0 and OpenID Connect.
Amazon Cognito is the AWS service that is specifically designed for user authentication and authorization. It provides user management, authentication, and federation capabilities, allowing users to sign in directly with a user name and password or through third-party identity providers such as Facebook, Google, or Amazon. Amazon Cognito also supports features like user registration, email and SMS-based verification, and multi-factor authentication.
https://docs.aws.amazon.com/cognito/latest/developerguide/what-is-amazon-cognito.html
"Amazon Cognito is an identity platform for web and mobile apps. It’s a user directory, an authentication server, and an authorization service for OAuth 2.0 access tokens and AWS credentials. With Amazon Cognito, you can authenticate and authorize users from the built-in user directory, from your enterprise directory, and from consumer identity providers like Google and Facebook."
Amazon Cognito provides authentication, authorization, and user management for your web and mobile apps. Your users can sign in directly with a user name and password, or through a third party such as Facebook, Amazon, Google or Apple.
C is the answer
https://aws.amazon.com/cognito/
Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. Amazon Cognito scales to millions of users and supports sign-in with social identity providers, such as Apple, Facebook, Google, and Amazon, and enterprise identity providers via SAML 2.0 and OpenID Connect.
I think the answer should be D
It enables you to join Amazon EC2 instances to your domain easily and supports many AWS and third-party applications and services
key phrase: Users must be able to sign in directly with a user name and password, or through a third- party provider.
this is why Amazon Cognito is more appropriate for this option.
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