Add listUsers() mock

Added:

• Google Service Directory UsersResource API endpoint mocks:
  • google_service_directory->users->listUsers([
    • 'domain' => $domain,
    • 'maxResults' => $max_results,
    • 'query' => $query
  • ])

Fix getting user by an alias

Fixed:

• Providing an alias to get a user now returns the user (if one exists)

Note: This was originally intended to be released as version 0.3.1, but I accidentally tagged the wrong commit as 0.3.1, so this is now 0.3.2.

Add Gmail API mocks for delegated access

Added:

• Mocks for using the Gmail API to manage delegated access to accounts