You can cancel your account directly from the App, in the Login / Welcome page; selecting the "delete account " text will start the account deletion procedure.
If you are in the App, you can delete the account directly from the specific "Account " submenu in the hamburger menu in the upper left area of the App.
NOTE: Following cancellation of the account, in the following 30 days it will not be possible to register a new one using the same email.