The page dedicated to problems of implementing OAuth2 as a reusable, extendable and maintainable library [[http://tools.ietf.org/html/rfc6749|rfc6749]].

=== problem no.1 : still no clear picture of OAuth2 ===

<place your image here>

=== problem no.2 : inherent complexity ===

a list of challenges to approach when implementing OAuth2 library:
  * <insert your problems here>

=== problem no.3 : no problem visibility ===

<merge and update information from
http://pydanny.com/the-sorry-state-of-python-oauth-providers.html>

=== references ===

 * https://developers.google.com/oauthplayground/
 * https://developers.google.com/api-client-library/python/guide/aaa_oauth
 * https://github.com/hiidef/oauth2app - Django, MIT
 * https://pypi.python.org/pypi/rauth - client (consumer) side, MIT, PyPI [[PyPIOAuth|uses it]]