Hi @Segun Balogun10,
Welcome aboard! Thanks for posting your question in Tribe Community.
After verifying your GSC account using the DNS method, find the code within the Settings of your Property. Scroll to the Verification Settings section and select the Domain Name Provider drop down:
The code above can then be pasted into the apps settings. Learn more here.7
Update: Access verification code via this link: https://www.google.com/webmasters/verification/home4
Let me know if this helps or if you have any additional questions about verification- I'm happy to assist!