OAuth token error

OAuth token error

Hi, 
Im getting errors trying to generate OAuth token :

curl -X POST -H 'Content-Type: application/x-www-form-urlencoded' -H 'Accept: application/json' -d 'grant_type=client_credentials&scope=Desk.tickets.CREATE&client_id=1000.xxx&client_secret=xxx' 'https://accounts.zoho.eu/oauth/v2/token'

{"error":"missing_org_info"}

Couldn't find any info regarding this error. Can you please help me to understand what's wrong?

Thanks!