In may be hard to find on WordPress.org the link to edit your email and password.
Normally, you'd expect the edit link on http://profiles.wordpress.org/YOURUSERNAME/ to do that but you have to go to a different location.

  1. Make sure you are logged in.
  2. Then visit link: https://wordpress.org/support/profile/YOURUSERNAME/edit

Video tutorial

Related

http://wordpress.org/support/topic/how-to-change-email-address-for-wordpressorg-user-profile?replies=3