Meteor Google Calendar Push notification "Unauthorized WebHook callback channel" - meteor

Question

I want to use google calendar notification.
I have deployed my Meteor application to
https://google-push-notification.meteor.com
I have verified the url in google web master.
Added the same domain to Domain Verification of Google Console.
I have created Meteor rest api of https://google-push-notification.meteor.com/api/articles for get and post method both.
Below is the postman collection of apis. https://www.getpostman.com/collections/106be7c94d35fcbdb0f8
Post https://www.googleapis.com/calendar/v3/calendars/abc#gmail.com/events/watch
Authorization: Bearer ya29.YwJdqjlSv8Tkl5MEJgiVXQPGxE24ZfITuf8gt0C8DO_VHDvB_1mRAgpAx64R6Wpw8I6fiw
Content-Type: application/json
{
"id": "ya29.XwI-RJ54rS3dbRHgak8V_iTuV7uAWJoZfRFnUE76uCIIUbw4eILPsdEME56Jm5_EfDtWWWs",
"type": "web_hook",
"address": "https://google-push-notification.meteor.com/api/items"
}
I am getting the following response
{
"error": {
"errors": [
{
"domain": "global",
"reason": "push.webhookUrlUnauthorized",
"message": "Unauthorized WebHook callback channel: https://google-push-notification.meteor.com/api/articles"
}
],
"code": 401,
"message": "Unauthorized WebHook callback channel: https://google-push-notification.meteor.com/api/articles"
}
}
Why am I getting push.webhookUrlUnauthorized response even when I have verified my site in google and added the same domain in google console.
Can anyone please help us to solve the issue

Answer 1

According to the google forum, make sure you have validate the following items below:
Please make sure to follow the steps to correctly verify that the domain indeed belongs to you here: https://support.google.com/webmasters/answer/35179
It must be a https endpoint and the same endpoint must also be present in the developer console as per instructions here: https://developers.google.com/google-apps/calendar/v3/push#registering
Hope this resolve your issue. Cheers!