I am developing an application for the Google Apps Marketplace.
I use the Licensing API to retrieve the notifications. I need to get the information about admin, who installed the app, but the API doesn't provide me with this.
The solution I found is to use the Directory API to search users, but I get an error
{
    "error": {
     "errors": [
      {
       "domain": "global",
       "reason": "forbidden",
       "message": "Not Authorized to access this resource/api"
      }
     ],
     "code": 403,
     "message": "Not Authorized to access this resource/api"
    }
}
What is wrong with my request? Are there any other solutions to get the information about admin?
The auth scopes:
- "email" - "profile" - "https://www.googleapis.com/auth/drive" - "https://www.googleapis.com/auth/drive.file" - "https://www.googleapis.com/auth/admin.directory.user.readonly" - "https://www.googleapis.com/auth/admin.directory.group.readonly"