Is it posible to autogenerate characters at the server connect level?

Hi I am working in a user registration form, the current workflow for the server connect is

Validate data
password hash
Database insert
Setup mailer
Email send

The above works perfectly! However, I am trying to add an account verification step, where the user will receive an email with a validation url and a code they need to add to fully validate their account.

I am able to create the email and the validation url. However, I want the code to be auto generated at the server level, for security reasons. But I do not know how to do it in wappler.

Does anyone know how to do this?

Thanks

Juan