code: public VerifyDomainResponse verifyDomain(VerifyDomainRequest request) {
          checkNotNull(request, "object request should not be null.");
          assertStringNotNullOrEmpty(request.getDomainName(), "object domainName should not be null or empty");
  
          InternalRequest internalRequest =
                  this.createRequest("verifiedDomain", request, HttpMethodName.PUT, request.getDomainName());
          return this.invokeHttpClient(internalRequest, VerifyDomainResponse.class);
      }
docs: Verify the domain
  <p>
  When this API is called successfully, it will return a token which is used to verify domain. You should put the
  token into DSN setting as a TXT record, then SES can finish verifying automatically.
  
  @param request The request object which includes the domain to verify
  
  @see com.baidubce.services.ses.model.VerifyDomainRequest