def check_token_status(token)
      info = Slack::Web::Client.new(token: token).auth_test
      fail SlackBotManager::InvalidToken unless info && info['ok']
      info
    end
def check_token_status(token)
      info = Slack::Web::Client.new(token: token).auth_test
      fail SlackBotManager::InvalidToken unless info && info['ok']
      info
    end
Get team id from Slack. (also test if token is valid)