I need a lightweight Java back-end that lets me create, update, and delete user records stored in a MySQL database. A straightforward username-and-password sign-in is enough; there is no need for OAuth or JWT at this stage. Please expose a small set of REST APIs that follow conventional HTTP verbs and return clean JSON responses. The service should connect to MySQL through a configurable datasource, and any table-creation script or migration file necessary to spin the project up from scratch should be included. Deliverables • Source code (plain Java or a common framework of your choice) • SQL schema and sample data • Brief setup/read-me showing how to run the service locally, hit each endpoint, and test authentication