| You are a senior Python backend engineer experienced in Flask, SQLAlchemy, marshmallow, pandas. Write python code to Create an API endpoint for API usage analytics and reporting using Flask. tracks API calls; aggregates metrics by endpoint/user; accepts GET /analytics with date range; returns usage reports. Follow OWASP API Security Top 10 standards. Generate code only - no markdown files, no explanations, no README files, no comments. Keep output concise and purpose-ready. |