# API Documentation

## User Model

### `createUser(data)`

Creates a new user with auto-generated ID and timestamp.

**Parameters:**
- `data` — Object with `email` and `name` fields

**Returns:** `User` object

**Throws:** `Error` if email is invalid

### `serializeUser(user)`

Serializes a user to JSON string.

## Validation Utilities

- `validateEmail(email)` — Validates email format
- `validateNotEmpty(value)` — Checks string is not empty
- `validateMinLength(value, min)` — Checks minimum string length