I need a small REST-style service that exposes a single POST endpoint. Companies will call this endpoint and send user details as raw JSON; your code should validate the payload, persist each record in a MySQL table, and return a clear success or error message. Here is what I expect: • Endpoint: publicly reachable HTTPS route that accepts a JSON body. • Storage: data saved to a MySQL database you design, with sensible field types and indexing. • Logic: server-side validation (e.g., required fields, basic format checks) and structured error responses. • Delivery: full source code, a short README with setup steps, and a sample curl command that shows the endpoint working. Feel free to choose the language or framework you are most comfortable with—Node.js/Express, Python/Flask or FastAPI, Go, etc.—as long as installation is straightforward and the final result runs on a standard Linux host. If you have experience writing clean API documentation (OpenAPI/Swagger), note that in your bid; that will be a plus.