How to remove your Atlassian account
Because you may have a (commercial) relationship with Atlassian, you cannot just delete your account, of course. Instead, contact them using the link named. Of course, use the email address linked to your Atlassian account.
Direct removal link: http://www.atlassian.com/company/contact
Helpful Trick: Removing online data
Helpful Trick: Remove third-party logins
If you signed up for Atlassian using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Atlassian. Click here to find out how.