NoneType error with no client secret

[athoms]

Hi, thanks for this helpful project!

If the client secret is not specified in the configuration, the line

email-oauth2-proxy/emailproxy.py

Line 301 in f892aa1

example_client_status = [example_client_value in i for i in [client_id, client_secret]]

produces the error argument of type 'NoneType' is not iterable.

A simple fix would be
example_client_status = [example_client_value in i for i in [client_id, client_secret] if i is not None]
or just
example_client_status = [example_client_value in i for i in [client_id, client_secret] if i]
if empty strings can be ignored.

[simonrob]

Thanks for reporting this!