Validate existence data in the DATA CLIENT before the workflow follows

hello how are you?
I’m new to appgyver and have a doubt about the validation of information. I have a Data Client that is capturing the zip code from an API, I want it to validate before it makes a ‘Create Records’ if the zip coming from the API (text) is already registered locally. As I’m starting studies in the tool, this answer can be easy and I apologize for the lack of knowledge. (Note - I’m using google translator because I don’t master English)

I managed to solve it…after some time analyzing the “Formula” calls I ended up using the ‘IS_IN_ARRAY_BY_KEY(data.tab_cep, ‘cep’, appVars.cep_consulta.cep)’