Visit your profile page by clicking your name/profile photo in the top-right corner of the page.

On your profile page, scroll down to the bottom. You'll see a white button on the right side of the screen that says "Close my ZehMizeh Account." Click that to submit a deletion request.

This deletion will not take place before at least 3 business days have passed since the request was made. You will not be able to close your account if you still have projects open.