CREATE TABLE IF NOT EXISTS users (
  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
  username VARCHAR(60) NOT NULL UNIQUE,
  email VARCHAR(120) NOT NULL UNIQUE,
  password VARCHAR(255) NOT NULL,
  role VARCHAR(20) NOT NULL DEFAULT 'brother',
  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
