'Get subreddits the user has a relationship with.
The `where` parameter chooses which subreddits are returned as follows:
* `subscriber` - subreddits the user is subscribed to
* `contributor` - subreddits the user is an approved submitter in
* `moderator` - subreddits the user is a moderator of
See also: [/api/subscribe](#POST_api_subscribe),
[/api/friend](#POST_api_friend), and
[/api/accept_moderator_invite](#POST_api_accept_moderator_invite).'

@require_oauth2_scope('mysubreddits')
@validate(VUser())
@listing_api_doc(section=api_section.subreddits, uri='/subreddits/mine/{where}', uri_variants=['/subreddits/mine/subscriber', '/subreddits/mine/contributor', '/subreddits/mine/moderator'])
def GET_listing(self, where='subscriber', **env):

    self.where = where
    return ListingController.GET_listing(self, **env)
