Apex domains cannot have CNAME records.
Question and response
Question
dig usersglobalnet.com. NS
Answer
usersglobalnet.com. 5 NS ns1.usersglobalnet.com.
usersglobalnet.com. 5 NS ns2.usersglobalnet.com.
Authority
The response has no authority records.
Additional
ns1.usersglobalnet.com. 5 A 15.204.234.204
ns2.usersglobalnet.com. 5 A 15.204.234.204
ns1.usersglobalnet.com. 5 AAAA 2604:2dc0:101:200:0:0:0:830
ns2.usersglobalnet.com. 5 AAAA 2604:2dc0:101:200:0:0:0:830
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0