"error_code": 1100 "message": "You are not authorized to perform this operation

"error_code": 1100 "message": "You are not authorized to perform this operation

I saw several posting non of them answer how to resolve below error.

curl --location --request GET 'www.site24x7.com/api/monitors' \
--header 'Accept: application/json; version=2.0' \
--header 'Authorization: Zoho-oauthtoken 1000.dccxxxxxxx \
--header 'Cookie: _zcsr_tmp=<deleted>-8a24-49f8-8834-fd2249e21176; aeefa57a7c=38a<deleted>ff4ef020ae5; s247cname=1ffe04c9-8a24-49f8-8834-<deleted>; zaaid=<zaaid>'
 
{
    "error_code": 1100,
    "message": "You are not authorized to perform this operation"
}
 
scope 
Site24x7.Account.Read,Site24x7.Admin.Read,Site24x7.Reports.Read,Site24x7.Operations.Read,Site24x7.Reports.ALL
 
 
No idea what is extra setting with site 24*7 required get the results.Even scope and api are not clear enough to understand which scope can be used for specific api.