Regarding Request Properties, how can I reference another parameter in the Valuation, Validation script columns?

Hi Guys,

I am using Request Properties with the Angular Web Portal,

And I have, for example, the parameters "First Name" and "Last Name". In the Validation column of the "Last Name" parameter, I would like to retrieve the value of the "First Name" parameter to validate if a user with this full name that the user entered exists in the database.

How Am I supposed to do that?

I am using OIM 9.2