Run a "collection" with a single GET request with a variable, saving only certain JSON fields in a flatfile?

I am new to Postman and any advice is welcome.

I have a single GET request and I can pass a single variable, an email.

I need to run that GET request with 1000 emails and then store only certain JSON values in a flatfile.

Can I use Postman for this task? What guidance would you provide for me?

Have a look at Postman Flows.

Introduction | Postman Labs Docs

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