Organizations list empty

I'm trying to get the organization_id from the following url:
https://books.zoho.com/api/v3/organizations?authtoken=9f8cc6948b1d7a13940ade7b5dd157d4

The response is an empty array:
{"code":0,"message":"success","organizations":[]}

What am I missing? I have created the organization and filled out all information.