Read the GDPR, especially:
https://gdpr-info.eu/
Article 4 Definitions
Article 6 Lawfulness of Processing
Article 8 Childs Consent
Article 12 Transparency
Article 15 Right of access
Article 16 Right of Rectification
Be unhappy about the duplication of code
Article 17 Right of erasure
Be unhappy about the duplication of code