Add Sendgrid IP to create Subuser request

bubble-server/src/main/java/bubble/cloud/email/SendgridSmtpEmailDriver.java

@@ -13,12 +13,15 @@ import org.cobbzilla.util.http.HttpResponseBean;
 
 import javax.annotation.Nullable;
 import java.io.IOException;
+import java.util.List;
+import java.util.Map;
 
 import static bubble.cloud.storage.StorageCryptStream.MIN_DISTINCT_LENGTH;
 import static bubble.cloud.storage.StorageCryptStream.MIN_KEY_LENGTH;
 import static org.apache.http.HttpHeaders.AUTHORIZATION;
 import static org.apache.http.HttpHeaders.CONTENT_TYPE;
 import static org.cobbzilla.util.daemon.ZillaRuntime.die;
+import static org.cobbzilla.util.daemon.ZillaRuntime.empty;
 import static org.cobbzilla.util.http.HttpContentTypes.APPLICATION_JSON;
 import static org.cobbzilla.util.http.HttpUtil.getResponse;
 import static org.cobbzilla.util.json.JsonUtil.json;
@@ -52,12 +55,17 @@ public class SendgridSmtpEmailDriver extends SmtpEmailDriver {
             return super.setupDelegatedCloudService(configuration, parentService, delegatedService);
         }
 
+        final String sgIpsJson = doRequest("ips", HttpMethods.GET, null);
+        final List<Map<String, Object>> sgIps = json(sgIpsJson, List.class);
+        if (empty(sgIps)) die("No IPs set for the specified main Sendgrid user");
+        final String sgIp = (String) sgIps.get(0).get("ip");
+
         final Account accountWithDelegate = configuration.getBean(AccountDAO.class)
                                                          .findByUuid(delegatedService.getAccount());
         final String user = sgUsername(delegatedService);
         String password = generatePassword(MIN_KEY_LENGTH, MIN_DISTINCT_LENGTH);
         final CreateSubuserRequest data = new CreateSubuserRequest(user, accountWithDelegate.getEmail(), password,
-                                                                   new String[]{});
+                                                                   new String[]{ sgIp });
         doRequest("subusers", HttpMethods.POST, json(data));
 
         delegatedService.setDelegated(null).setTemplate(false);