The hacker can used a MySQL Injection that can change the database information without permission. My e-mail also changed, so he can changed all the users e-mail. That is a simple attack that anyone can do, but I don't warn it to earntomorrow administrators because I thought that they will not have this problem.The online chat says that you have to send a e-mail to support@earntomorrow.com informing your account username and the e-mail that you want to put in the account