Unable to get access token response in postman

I have setup latest version of openemr 7.0.2 and xampp8.2.12 on windows and i have enabled FHIR API, I can be able to run the FHIR Server localhost:8089/openemr/apis/default/fhir/metadata, but i am not able to get access token from postman, getting status 200 but in response it is showing some error.