If you're using external databases or customer registration apps like Customer Fields (https://apps.shopify.com/customr ), it's important to be aware of potential issues when a customer deletes their account and then re-registers.
When customer information is deleted from Shopify via the "Delete Me" app, apps like Customer Fields may store customer data in a separate database. As a result, if the same customer attempts to register or log in again, it can lead to errors.
The "Delete Me" app only deletes customer data from Shopify logically and cannot delete information stored by apps like Customer Fields. However, this issue can be addressed by using the app’s webhook feature.
By utilizing the webhook in "Delete Me", you can receive the Shopify customer ID, allowing you to handle the external server or Customer Fields customer information accordingly.