Use array of emails for to destination

src/config/params.json

@@ -1,6 +1,13 @@
 {
   "sendgrid": {
-    "to": "onja@blastream.com",
+    "to": [
+      {
+        "email": "onja@blastream.com"
+      },
+      {
+        "email": "onja.asmad@gmail.com"
+      }
+    ],
     "from": "contact@blastream.com",
     "fromName": "Blastream",
     "uri": "https://api.sendgrid.com/v3/mail/send",

src/subscribers/emailSubscriber.js

@@ -49,11 +49,7 @@ module.exports = (app) => {
     const data = {
       personalizations: [
         {
-          to: [
+          to: to,
-            {
-              email: to,
-            }
-          ],
           subject: subject
         }
       ],