It’s common for providers to ask you to add a TXT record to a DNS so they can verify that you own the domain. If you use AWS (Route 53) for your domain, be aware that while you can create multiple TXT records, only one will be visible to outside queries. Instead of creating a new TXT record set as instructed, add to the existing “unnamed” TXT you already have. (Start each entry on a new line in the Route 53 interface.)