You can do this without installing the app. You will be signed out on every device immediately, and everything is destroyed after a 14-day grace period.
What gets deleted
Your account, your messages, your files, your posts, reactions, subscriptions and push tokens. It is irreversible — there is no backup we can restore you from.
Changed your mind?
Sign in again within those 14 days and the deletion is cancelled. Nothing else is required.
Or, in the app: Settings → Account → Delete account.