You can go to Admin > Account > Account Details > and click on 'Cancel account' under Account Status. 

It would be really helpful if you share your feedback and the reason behind canceling your account with us. You can then hit the 'Request Cancellation' button on the next page and confirm the action on the following pop-up window. Note that you will have to be an 'Account Administrator' on the portal to perform this action.

You will have 24 hours before your account gets suspended, and 14 days (2 weeks) before we delete your account and account data permanently.

Note: Please make sure to export your account data before canceling your account.