code: public VerifyDKIMResponse verifyDKIM(VerifyDKIMRequest 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());
          internalRequest.addParameter("dkim", "true");
  
          return this.invokeHttpClient(internalRequest, VerifyDKIMResponse.class);
      }
docs: Verify the DKIM
  <p>
  When this API is called successfully, it will return a group of tokens,you should use this tokens to create DSN
  CNAME records, then SES can finish verifying automatically.
  
  @param request The request object which includes the DKIM to verify
  
  @return The response object includes a group of tokens
  
  @see com.baidubce.services.ses.model.VerifyDKIMRequest
  @see com.baidubce.services.ses.model.VerifyDKIMResponse