added reference, anonymization

Signed-off-by: bidi <[email protected]>

docs/book/v5/reference/account-anonymization.md

@@ -0,0 +1,40 @@
+# Account anonymization
+
+## Premise
+
+According to the GDPR, companies that record personal data from EU citizens must delete said data if its owner requests its deletion.
+An alternative is to anonymize the data, according to [this article](https://commission.europa.eu/law/law-topic/data-protection/reform/rules-business-and-organisations/dealing-citizens/do-we-always-have-delete-personal-data-if-person-asks_en).
+
+## Definition
+
+### What is Personally identifiable information?
+
+According to [this article](https://commission.europa.eu/law/law-topic/data-protection/reform/what-personal-data_en), Personally identifiable information (PII) is:
+
+- A name and surname.
+- A home address.
+- An email address such as [email protected].
+- An identification card number.
+- Location data (for example the location data function on a mobile phone).
+- An Internet Protocol (IP) address.
+- A cookie ID.
+- The advertising identifier of your phone.
+- A phone number.
+- Data held by a hospital or doctor, which could be a symbol that uniquely identifies a person.
+
+Out of the box, Dotkernel API saves the user's name (firstname and lastname) and email (identity).
+This personal data is used for emails related to password reset and account activation.
+
+## Process
+
+### Anonymization
+
+The anonymization process makes these replacements:
+
+- The firstname and lastname are replaced with `anonymous` concatenated with the current UNIX timestamp, e.g. `anonymous1725980747`.
+- The email is replaced with `anonymous` concatenated with the current UNIX timestamp and the value in `userAnonymizeAppend`, e.g. `[email protected]`.
+- The avatar image and its database record are deleted.
+
+The `userAnonymizeAppend` key can be set in `config/autoload/local.php` or left empty.
+
+> Using an email domain for `userAnonymizeAppend` would work as a catch-all email, if your email service provider has this option enabled.

mkdocs.yml

@@ -57,6 +57,8 @@ nav:
             - "Render Documentation": v5/openapi/render-documentation.md
             - "Use Documentation": v5/openapi/use-documentation.md
             - "Getting Help": v5/openapi/getting-help.md
+      - Reference:
+            - "Anonymize Accounts": v5/reference/account-anonymization.md
   - v4:
       - Introduction: v4/introduction/introduction.md
       - Overview: