human
Solve the following python programming problem given the following code:
def oauth_aware(self, method) : 
    "Decorator that sets up for OAuth 2.0 dance, but doesn't do it.

    Does all the setup for the OAuth dance, but doesn't initiate it.
    This decorator is useful if you want to create a page that knows
    whether or not the user has granted access to this application.
    From within a method decorated with @oauth_aware the has_credentials()
    and authorize_url() methods can be called.

    Args:
      method: callable, to be decorated method of a webapp.RequestHandler
        instance.
    " 
    def setup_oauth(request_handler, * args) : 
        if self._in_error : 
            self._display_error_message (request_handler) 
            return 
user = users.get_current_user () 
        if (not user) : 
            request_handler.redirect (users.create_login_url (request_handler.request.uri)) 
            return 
self.flow.params ['state'] = request_handler.request.url 
        self._request_handler = request_handler 
        self.credentials = StorageByKeyName (CredentialsModel, user.user_id (), 'credentials').get () 
        method (request_handler, * args) 
return method 

    
    

    Fix the buggy line: return method
assistant
#Here is Python program to fix the buggy line: return method
.

return def setup_oauth(