The text discusses the use of Ory's Oathkeeper, an open-source authorization service, as an authorizer for requests passing through AWS API Gateway, providing a solution for those who seek more control over their UI compared to other popular services like Auth0, AWS Cognito, and Firebase. The author explains the process of deploying Oathkeeper to AWS Lambda, detailing the necessary components such as a configuration file, a rules file, a Go executable, and a JSON web keys file. The guide includes instructions on setting up the environment, compiling the Go program, and integrating it with AWS services like API Gateway and Secrets Manager. The author emphasizes the importance of correctly configuring IAM roles and policies for accessing secrets and mapping HTTP headers to ensure smooth integration with backend services. The text concludes with troubleshooting tips and an invitation for further engagement on social media.