CREATE TABLE IF NOT EXISTS `users` (
  `id` INT AUTO_INCREMENT PRIMARY KEY,
  `username` VARCHAR(255) NOT NULL UNIQUE,
  `email` VARCHAR(255) NOT NULL UNIQUE,
  `password` VARCHAR(255) NOT NULL,
  `role` ENUM('Requester', 'Dept Manager/GM', 'System Div Admin', 'Planning Dept', 'System GM', 'Admin') NOT NULL DEFAULT 'Requester',
  `created_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;