OKTA API Creation

Hi Friends, Am new to OKTA starting with API on LOGIN , Registration etc, how can i send parameters (which all parameters required) can you show me one example to start with.

For Example am using https://developer.okta.com/docs/api/resources/users.html#create-user-with-password respective api, how can i start off.

Thank you

The best way to start using the APIs is to run the postman collections.
Follow the steps in this page - https://developer.okta.com/docs/api/getting_started/api_test_client.html