Apex domains cannot have CNAME records.
Question and response
Question
dig ghadmin.com. NS
Answer
ghadmin.com. 1 NS ns-1985.awsdns-56.co.uk.
ghadmin.com. 1 NS ns-2031.awsdns-61.co.uk.
ghadmin.com. 1 NS ns-684.awsdns-21.net.
ghadmin.com. 1 NS ns-1801.awsdns-33.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0