To deactivate your registry, complete the following steps:
Are you using a computer?
Click your name on the top right hand side of your registry to access the account drop down menu > Settings > Account Info. From there check "Deactivate Account" and hit Save. If you are logged in, a direct link is here.
Are you using the app?
Tap the menu bar in the upper left-hand corner. Tap Account > Deactivate Your Account.