The hamburger, or fly-out, menu that you can always see on the top-right of Skubana contains a link to your Profile page, which is also accessible from the Settings module.
When you click My Profile on the hamburger menu, you will see your profile page appear on your screen.
To update or change your email address and name, e.g. in case you get married, enter the new values in the email address and name fields, then click Update.
To change your password, enter your current password, then your new password twice, then click Change Password.