To make any changes to your account profile, please log in with your email address and password to the full site version of the site. You will not be able to change your profile from mobile at this time. Once logged in, you will see your profile pic or initials in the upper right area of the page. Click that circle and choose the "Settings" option.
From "Settings", you can update your name and/or email address. To change the password for your account, click the "Password" tab. Remember to click "Update Profile" to save any changes. All of your account information will update immediately once you have logged out and logged back into your account.