How can i test webservices using katalon studio, I am trying and getting unsupported grant type error in response

How can i test webservices using katalon studio, I am trying and getting unsupported grant type error in response

 

Can anyone please share any sample webservices with all data

Can anyone help me on getting this resolved?

{“error”: “unsupported_grant_type”}

The error means the credential(username and password) is missing in request body of Request Object. Can you show us a screenshot of the API and the Test Request.

Thanks