tokens property
If you used Easy DKIM to configure DKIM authentication for the domain, then this object contains a set of unique strings that you use to create a set of CNAME records that you add to the DNS configuration for your domain. When Amazon SES detects these records in the DNS configuration for your domain, the DKIM authentication process is complete.
If you configured DKIM authentication for the domain by providing your own public-private key pair, then this object contains the selector for the public key.
Regardless of the DKIM authentication method you use, Amazon SES searches for the appropriate records in the DNS configuration of the domain for up to 72 hours.
Implementation
final List<String>? tokens;