CREATE TABLE IF NOT EXISTS `users` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `username` VARCHAR(50) NOT NULL UNIQUE,
  `password` VARCHAR(255) NOT NULL,
  `email` VARCHAR(100) NOT NULL UNIQUE,
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Insert a default admin user for testing
-- IMPORTANT: This is for initial setup only. Passwords should be hashed in a real application.
INSERT IGNORE INTO `users` (`username`, `password`, `email`) VALUES ('admin', 'admin', 'admin@example.com');