Apex domains cannot have CNAME records.
Question and response
Question
dig us.cloudlogin.co. NS
Answer
us.cloudlogin.co. 5 NS dns2.supremedns.com.
us.cloudlogin.co. 5 NS dns1.supremedns.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0