getResourceOwner fails with "Access token is empty"

[br4nnigan]

Since you need the resource owner e-mail to use the token with say PhpMailer, it would be nice to obtain it automatically.

I would have expected that this works:

$authUrl = $provider->getAuthorizationUrl([
  'scope' => [
    'https://outlook.office.com/SMTP.Send',
    'offline_access',
    'https://outlook.office.com/User.Read' # <----added this
  ]
]);

...

$token = $provider->getAccessToken(
  'authorization_code',
  [
    'code' => $_GET['code']
  ]
);
$provider->getResourceOwner($token); 

The last line of the quote fails with "InvalidAuthenticationToken","message":"Access token is empty." Hardcoding the email the workflow works fine.