Email confirmation on account deletion

New Feature / Enhancement Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.

Current Limitation

Currently, when we delete an account from the Parse.User class, there is no email confirmation option.

Feature / Enhancement Description

See: https://community.parseplatform.org/t/docs/2698/16

With Apple requiring automated account deletion on apps by July 2022, It would be good to have a secondary line of defense when we delete User objects from the data before actually going through the deletion process.

Upon calling account deletion method, much like the built in resending of verificationEmail or forgot password methods, account deletion too should have a confirmation email.

Example Use Case

1. User request his account deletion via app.
2. Parse-server receives the request.
3. Parse-server sends out confirmation email to said account.
4. User checks his email and clicks on confirmation link.
5. Parse-server deletes the said account.
6. Developer can have other functions in afterDelete cloudcode to remove other objects that need to be deleted.

Alternatives / Workarounds

none.

3rd Party References

no.

Review the existing Parse.User account-deletion flow and the built-in verification-email and forgot-password methods mentioned in the issue. Define the confirmation-email and confirmation-link behavior, including how deletion proceeds after confirmation, then add coverage showing that the account is deleted only after confirmation and that afterDelete behavior remains available.