To get your team status sent automatically once a week to a Slack channel, go to Settings ► Integrations tab under the Setup menu, where you'll find Slack listed as one of the available integrations. Click the logo, and you'll see the Add to Slack button.
Clicking the button allows you to authenticate via OAuth, and to choose the channel where you would like to receive the digest. Once done, you'll start receiving a weekly update every Monday of your team status directly to your Slack:
To disable the integration, click Disable integration and remove API key button in the Slack integration settings.