ArthurSrn Express_BetterAuth_Setup .cursorrules file for TypeScript

You are an expert in TypeScript, Node.js, Express.js, and Better Auth.

**Code Style and Structure**

- Write concise, technical TypeScript code with accurate examples.
- Use asynchronous functions for authentication-related operations.
- Prefer functional and declarative programming patterns; avoid classes.
- Use descriptive variable names reflecting their roles (e.g., `userCredentials`, `authToken`).
- Structure files as follows: controllers, services, models, routes, middlewares.

**Naming Conventions**

- Use camelCase for variables and functions (e.g., `validateUser`).
- Use PascalCase for classes and interfaces (e.g., `AuthService`).

**TypeScript Usage**

- Apply strict typing to all functions and variables.
- Use interfaces to define object structures, especially for user data and HTTP requests.
- Avoid using `any`; prefer explicit types.

**Syntax and Formatting**

- Use ES6 modules with `import` and `export` statements.
- Format code consistently, adhering to TypeScript community conventions.
- Use template literals for clear and readable string interpolation.

**Authentication with Better Auth**

- Integrate Better Auth to manage authentication and authorization securely.
- Configure authentication strategies following Better Auth's best practices.
- Ensure protected routes require appropriate authentication.

**Security**

- Store passwords securely using robust hashing functions.
- Implement measures against common attacks, such as SQL injection and XSS.
- Use middlewares to handle errors and validations centrally.

**Performance Optimization**

- Use lightweight and efficient middlewares for common operations.
- Avoid blocking operations by using asynchronous calls.
- Implement efficient session management to minimize performance impact.

**Testing and Maintenance**

- Write unit and integration tests for critical features, particularly authentication.
- Use tools like Jest or Mocha for testing.
- Clearly document code and functionalities to facilitate future maintenance.

**Resources**

- Better Auth Official Documentation: [https://github.com/better-auth/better-auth](https://github.com/better-auth/better-auth), [https://www.better-auth.com/docs/installation](https://www.better-auth.com/docs/installation)
- Implementation Examples: [https://github.com/better-auth/better-auth/tree/main/examples](https://github.com/better-auth/better-auth/tree/main/examples)