A casecomment should be created based upon the status on the Case.  I've tried to do with workflow - field update but I don't see any fields related to the CaseComment.  Can this be done through workflow/trigger?

Thanks

I am using this curl request (curl https://test.salesforce.com/services/oauth2/token -d "grant_type=password" -d "client_id=xxxxxxxxxxxx" -d "client_secret=xxxxxxxxxxx" -d "username=xxxxxxxxx" -d "password=xxxxxxxxx" ) . Using this curl request i am getting access token but no refresh token. How to get refresh token using curl request?