Velo by Wix is an open source development platform which aims to provide accelerated Web Application development tools. I having been using it for more than 3 years now and have built a small web development agency focusing on providing accelerated web application development services to businesses globally.
The Wix Data API is the most crucial API that Wix Velo offers. With this API you can perform any type of interaction you can imagine for your Wix Databases. Now, dealing with databases is a sensitive process which should be handled only by trained software professionals but due to the nature of Wix and Wix Databases anyone can easily create and manage them. However this does not mean the database related threats are diminished because even with Wix there are some security considerations you should keep in mind when dealing with databases. We go over one of the topics 'Data Validation' in the below video.
Server Side Code Sample
Checkout a sample code below for server side validation of an email and entry into a Wix database.