Amazon Cognito Gets Simpler M2M Auth Without Domain Setup
Amazon Cognito now lets your apps handle machine-to-machine authorization using the new GetClientToken API—no user pool domain needed. Just authenticate with client credentials and grab access tokens directly via AWS SDK, CLI, or API, making service-to-service communication way easier for microservices and automated workloads across all AWS Regions.
source: [aws/whats-new]