It would be great to send some information about the customer inside the loaded script-tag on the website. This way we can easier identify the customer, for example based on their customer_id.

For example:

window.Watermelon.customfields.Voornaam = 'Robin';

window.Watermelon.customfields.Achternaam = 'Dirksen';

window.Watermelon.customfields.Email = 'robin.dirksen@my-email.com';

window.Watermelon.customfields.CustomFieldForUserId = 11538;