CREATE TABLE IF NOT EXISTS new_users (
  id INT(11) NOT NULL,
  username VARCHAR(50) NOT NULL,
  password VARCHAR(255) NOT NULL,
  created_at DATETIME DEFAULT CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

ALTER TABLE new_users
  ADD PRIMARY KEY(id),
  ADD UNIQUE KEY(username);
  
 ALTER TABLE new_users 
  MODIFY id INT(11) NOT NULL AUTO_INCREMENT;

ALTER TABLE new_users 
	CHANGE created_at created_at DATETIME DEFAULT NULL;

ALTER TABLE temp_registration 
	ADD old_pass VARCHAR(50) DEFAULT NULL AFTER password,
	ADD old_email VARCHAR(50) DEFAULT NULL AFTER old_pass,
	ADD old_username VARCHAR(50) DEFAULT NULL AFTER old_email;