Now I'm using GET list members id method to check user is a member of
the specified list.
But if user has a lot of list, this method takes a long time to check.
(because it requires one request to check one list)
anyone have any better ideas about this problem?
I sent email to request xauth access,
and I got reply that my application now has the ability to use xAuth.
but I'm having problem that
[401 error - Failed to validate oauth signature and token] when
requesting access token.
So I want to check that my application is supporting xauth or not,
