What is the best practice to call API gateway from postman? Right now, for testing purpose, I have created one IAM user and use its credentials to call API gateway from postman. Is that the only way to call api gateway apis from postman? Or is there any better way? Because I have heard that IAM user is not a recommended way of doing the authentication?

For calling from other AWS Certified account and so, we normally use IAM roles to do that but for postman is there any better way?