An analytics company uses Amazon VPC to run its multi-tier services.

This solution will meet the requirements with the most operational efficiency because:

Amazon Cognito user pools provide a secure and scalable user directory that can store and manage user profiles, and handle user sign-up, sign-in, and access control. User pools can also integrate with social identity providers and enterprise identity providers via SAML or OIDC. User pools can issue JSON Web Tokens (JWTs) that can be used to authenticate users and authorize API requests.

Amazon API Gateway REST APIs enable you to create and deploy APIs that expose your backend services to your clients. REST APIs support multiple authorization mechanisms, including Cognito user pools, IAM, Lambda, and custom authorizers. A Cognito authorizer is a type of Lambda authorizer that uses a Cognito user pool as the identity source. When a client makes a request to a REST API method that is configured with a Cognito authorizer, API Gateway verifies the JWTs that are issued by the user pool and grants access based on the token’s claims and the authorizer’s configuration.

By using Cognito user pools and API Gateway REST APIs with a Cognito authorizer, you can achieve a high level of security, scalability, and performance for your web analytics service. You can also leverage the built-in features of Cognito and API Gateway, such as user management, token validation, caching, throttling, and monitoring, without having to implement them yourself. This reduces the operational overhead and complexity of your solution.