Instruction on how to add TXT record if you buy your domain on porkbun.com
Log in to your account on porkbun.com
On the opened page, select the desired domain and click "Details"
In the "Details" window find "DNS Record" and click on "Edit"
You will have new fields of information:
Type-select "TXT"
Host-enter "@" or desired subhost name ("vault" or "collection" for example)
Answer- put the TXT record value here
TTL* - stay Default
Once you have filled in all the fields, click on the "Add" button.
It may take some time to propogate the updated record throughout the internet. Usually the new information becomes accessible in 15 minutes but in some cases it may take a few hours.