Merge pull request #325 from djmitche/token_generator_fix

Fix documentation for token_generator signature

docs/oauth2/preconfigured_servers.rst

@@ -14,11 +14,13 @@ Construction is simple, only import your validator and you are good to go::
 
 If you prefer to construct tokens yourself you may pass a token generator::
 
-    def your_token_generator(request):
+    def your_token_generator(request, refresh_token=False):
         return 'a_custom_token' + request.client_id
 
     server = WebApplicationServer(your_validator, token_generator=your_token_generator)
 
+This function is passed the request object and a boolean indicating whether to generate an access token (False) or a refresh token (True).
+
 .. autoclass:: oauthlib.oauth2.WebApplicationServer
     :members: