You can delete your accout by following these steps.
For website (using PC):
1. Click on the icon of your account in the top right menu.
2. Confirm your User ID of your account (after the @ symbol).
3. Access the 'Delete my Account page' (also accessible from the menu).
4. Enter your User ID and click on 'Delete account.'
For website (using smartphone), iOS app, or Android app:
1. Click on the account in the bottom right menu.
2. Confirm your User ID of your account (after the @ symbol).
3. Scroll to the bottom of the page and click on 'Delete account.'
4. Enter your User ID and click on 'Delete account.