Getting insufficient rights to query records via REST API using admin credential

Using REST need to extract to pieces of data.

1)  Count of VMware Templates in use and I am able to extract this data by the following GET

    {{server}}{{path}}/stats/cmdb_ci_vmware_template?sysparm_count=true

2)  Count of VMware Templates that have credentials and I am unable to extract this data using GET

    {{server}}{{path}}/stats/cmdb_ci_vmware_template?sysparm_query={credential}=true&sysparm_count=true

   Get the JSON message using admin credentials

   {
       "error": {
             "detail": "No permission to read column(s): [{credential}]",
             "message": "Insufficient rights to query records"
        },
        "status": "failure"
    }

Either my query is not right or some parts of CMDB are not accessible via REST, even as admin. I think the issue is former but need confirmation and help. Thanks.