def login_user_facebook(access_token):
	user_info = facebook_service.get_user_info(access_token)

	user_id = ext_platform_dao.get_external_link("facebook", user_info["id"])

	logged_in_user = None
	if user_id != None:
		logged_in_user = user_dao.get_user_by_id(user_id)
	else:
		logged_in_user = None

	return logged_in_user
def get_user_by_id(user_id):
	return user_dao.get_user_by_id(user_id)