Enhance login functionality with caching and error handling

[mikemtdev]

Improve login process by adding user caching, enhancing MongoDB connection logic, and implementing detailed error logging. This update aims to optimize performance and provide better insights during failures.

[Copilot]

Pull Request Overview

This PR enhances the login functionality by implementing user caching for performance optimization, refactoring MongoDB connection handling for better reliability, and adding comprehensive error logging and debugging capabilities throughout the authentication process.

• Implements user caching with 5-minute TTL to reduce database queries
• Refactors MongoDB connection logic with proper connection pooling and error handling
• Adds extensive logging for debugging authentication issues and performance monitoring

Reviewed Changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 8 comments.

File	Description
src/middleware.ts	Adds debug logging for unauthorized access attempts
src/app/api/lib/db/index.ts	Refactors MongoDB connection with caching, pooling, and error handling
src/app/api/auth/login.ts	Implements user caching, combines queries for efficiency, and adds comprehensive logging

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

Adding error handlers inside the connection function will create multiple listeners on repeated calls. Move the error handler setup outside the function or check if handlers are already attached.

Suggested change

	await cachedClient.connect();
	}
	const db = cachedClient.db(process.env.MONGODB_DB);
	cachedDb = db;
	// Add connection error handler
	cachedClient.on('error', (error) => {
	console.error('MongoDB connection error:', error);
	cachedClient = null;
	cachedDb = null;
	});
	// Add connection error handler
	cachedClient.on('error', (error) => {
	console.error('MongoDB connection error:', error);
	cachedClient = null;
	cachedDb = null;
	});
	await cachedClient.connect();
	}
	const db = cachedClient.db(process.env.MONGODB_DB);
	cachedDb = db;

[Copilot]

Copilot encountered an error and was unable to review this pull request. You can try again by re-requesting a review.