If the refresh token expires for the Oracle Fusion Field Service Adapter connection, the following error occurs.

{
 "status": 400,
 "message": "[DefaultAuthSecurityHandler] Could not refresh the access token. The access token response 
returned an unsuccessful status [400].",
 "Error": {
 "error": "invalid_grant",
 "error_description": "The token has already been consumed.",
 "ecid": "C9gaz1lIGI0000000"
 }
}

1. Go to the Connections page for the Oracle Fusion Field Service Adapter connection.
2. Click Test.
   If the connection test fails with the above error, the refresh token has expired. You must re-authenticate the authentication flow.
3. Click Provide Consent to re-authenticate with the Oracle Cloud Infrastructure Identity and Access Management credentials.