Automatically set cookie in Postman

Test.md

In the Tests tab of your request, type this code

let cookie = postman.getResponseHeader("Set-Cookie");
postman.setEnvironmentVariable("cookie", cookie);

This will set an environment vairable. In all the requests that need cookie, add to the Request Header

Key: Cookie Value: {{cookie}} // this is the environment variable set by our test

Ref: https://sqa.stackexchange.com/a/33588/18558