Solved
Not getting Refresh Token
When I use grant_type as client_credential in my oauth API, I am no longer getting refresh token in response. This has broken my integration. I don't know how to refresh my access token when it expires after 60 mins
Refresh Token API is not needed for authentication via client_credential flow. You need to re-invoke /oauth2/v1/token API to fetch new valid access token when your old access token expires after 60 mins.