Gmail API domain-wide delegation

Question

I am using Gmail API and I am trying to fetch emails from all users under company. But when I run code such as:

function runAPI(auth) {
  var gmail = google.         


        

Answer 1

For the question How do I properly setup domain wide delegation for Gmail API?

I think this documentation from Google can help you with this, just follow this steps to delegate domain-wide authority.

1. Go to your Google Apps domain’s Admin console.

2. Select Security from the list of controls. If you don't see Security listed, select More controls from the gray bar at the bottom of the page, then select Security from the list of controls. If you can't see the controls, make sure you're signed in as an administrator for the domain.

3. Select Show more and then Advanced settings from the list of options.

4. Select Manage API client access in the Authentication section.

5. In the Client Name field enter the service account's Client ID. You can find your service account's client ID in the Service accounts page.

6. In the One or More API Scopes field enter the list of scopes that your application should be granted access to. For example, if your application needs domain-wide access to the Google Drive API and the Google Calendar API, enter: https://www.googleapis.com/auth/drive, https://www.googleapis.com/auth/calendar.

   In your case, use this scope for Gmail API.

7. Click Authorize.

For more information about the error 403 or Delegation denied for ,check this related SO question:

• Gmail API returns 403 error code and “Delegation denied for user email"

• GMail API Super Admin access other users accounts via API?