c.JupyterHub.authenticator_class = 'oauthenticator.LocalGitHubOAuthenticator'
c.GitHubOAuthenticator.oauth_callback_url = '*~blah~*'
c.GitHubOAuthenticator.client_id = '*~blah~*'
c.GitHubOAuthenticator.client_secret = '*~blah~*'
c.LocalAuthenticator.create_system_users = True
c.Authenticator.whitelist = {'userx'}
c.Authenticator.admin_users = {'userx'}
c.Spawner.notebook_dir = '~/notebooks'