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Adds user authentication to web and mobile apps with Amazon Cognito (user pools and identity pools) and the AWS Amplify client auth libraries. Covers…
AWS Auth (Amazon Cognito) Application-level user authentication and authorization with Amazon Cognito and the Amplify client auth libraries. Verify specific limits, quotas, and exact API shapes against official AWS documentation when precision matters; trust the docs over memory when they conflict. Recommended: The AWS MCP server provides streamlined access to the AWS APIs used in this skill (Cognito user pool/app client/identity pool setup, API Gateway authorizers). If it is unavailable, the AWS CLI commands shown throughout work directly — the skill has no hard dependency on MCP. When NOT to use: Amplify Gen2 backend code (defineAuth, amplify/auth.ts, npx ampx); IAM policy/role/trust-policy authoring, STS, or IAM Identity Center console SSO; API Gateway route/integration setup or Lambda function implementation (this skill covers only the Cognito/JWT authorizer configuration and the purpose of Cognito Lambda triggers). User Pool vs Identity Pool — pick first These are different services that are frequently confused. Most apps need a user pool; add an identity pool only if the client must call AWS services directly.
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