[API issues] You are not authorized to perform this operation

Hi team

We are facing an issue when we are not able to use site24 API. I regenerated token for my account , but It still not working

[astrilet@test site24x7]$ curl https://www.site24x7.com/api/monitors -H 'Authorization: Zoho-authtoken <token>'
{"error_code":1100,"message":"You are not authorized to perform this operation"}