Non-admin read-only access to Google Admin SDK - google-apps

Question

In a post on the Google Developers blog from September 23, 2014, it says:
Read access to all domain users
Historically, only admins have been able to access the data in the Admin SDK.
Beginning today, any user (not just admins) will now be able to call the
Directory API to read the profile of any user on the domain (of course, we
will respect ACLing settings and profile sharing settings).
However, despite checking every Google Apps Admin setting I can find, my calls calls to the Directory API fail for non-admin users. Condensed code:
params = {
client_id: XXXXXX,
scope: 'https://www.googleapis.com/auth/admin.directory.user.readonly',
response_type: 'token id_token',
immediate: true
};
gapi.auth.authorize(params, gHandleAuthResult);
var request = gapi.client.request({
'path': '/admin/directory/v1/users',
'params': {
'customer': 'my_customer',
}
});
request.then(function (response) {
var users = response.result.users;
if (!!users && users.length > 0) {
users.forEach(function (user) {
newMember.id = user.id || '';
}
}
}
This is using the Google API Client Library for JavaScript. I've tried this on multiple Google Apps accounts, it always works for admin accounts, never for non-admins, for whom I get the response "Not Authorized to access this resource/api".
A previous post asked about this and received a response that you have to use a service account, but that was from June 2014, before the blog post. I have succeeded in making the call using a service account, but would rather not have to do so as it requires a server to act as a bridge.
The Google developer docs say that "Google engineers monitor and answer against the tag google-admin-sdk", so hoping for an answer from Google here.

Answer 1

Try:
var request = gapi.client.request({
'path': '/admin/directory/v1/users',
'viewType': 'domain_public'
'params': {
'customer': 'my_customer',
}
});
viewType=domain_public is needed to perform Directory operations as a non-admin as described in the reference documentation. There's also a bit more explanation in the user accounts docs.