script to invite everyone on a slack team to a particular channel.
git clone [email protected]:makesaltlake/inviterator.git && cd inviterator
bundle install
SLACK_API_TOKEN="xoxp-..." bundle exec bin/inviterator some_channel
will invite all users on your Slack team to #some_channel. xoxp-... is a token you'll need to grab from https://api.slack.com/custom-integrations/legacy-tokens.