Apex domains cannot have CNAME records.
Question and response
Question
dig mylogin.co. NS
Answer
mylogin.co. 3 NS dns2.mylogin.co.
mylogin.co. 3 NS dns1.mylogin.co.
Authority
The response has no authority records.
Additional
dns1.mylogin.co. 3 A 162.210.102.140
dns2.mylogin.co. 3 A 198.23.56.4
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0