How can I change my account email and password

In the top right of the header, there is an icon with the user’s initials and a dropdown menu that allows you to change your email, password or log out. 

Changing your email requires the user to enter your current password and follow the email verification workflow.

Changing your password requires the current password and a new password.

Selecting "User Account" from the top right site menu allows you to update your name, email, and password.