Keep your account information up to date. You can change information on your profile like your email address and phone number.
1. Login to your Domains.coop account - https://my.domains.coop
2. Click on Welcome (name) in the top right corner > Edit Details
3. Update the information as needed > Save changes
Your account information will be updated.
Note - updating the email address username for your customer account does not update your domain name registrant information. Please review the article on WHOIS contacts to update your registrant information.