Make sure it's easy for users to delete their accounts

Just a small tip when creating a new product is to make sure it's very easy for anyone to unsubscribe to your newsletters or delete their account. This is a win-win situation: you don't want to keep those users and making the process hard for them will just be bad to your service: they can mark your emails as spam, give negative reviews about the product, etc.

And don't bother with "soft-delete" (i.e. an account can be restored later) as it's a pain to implement and potentially violates GDPR. Just do a classic "hard delete" and make sure to warn users before.