Buttons and menus are named exactly as the app shows them.
Steps
Open your account
Open your account from your picture, then go to the danger zone at the bottom.
Where: Account
Wipe the data, keep the account
Delete all app data clears routines, logs, goals, people, notes and every synced collection. Type DELETE ALL DATA to confirm.
Delete the account
Type DELETE MY ACCOUNT, then choose Delete account permanently. Your data is removed and you are signed out.