1. Sign into your Mailchimp account.
2. Click this link to navigate to the API Keys section of your Mailchimp account: Your API Keys
3. Copy an existing API key or click the Create A Key button.
4. Copy the API key you just generated/copied in MailChimp and bring it to the Stampede portal. Head over to 'settings' then 'integrations'.
5. Go to the MailChimp option and hit "Add Integration". Paste the API key onto the window that will pop up.
6. Hit save and set the list you'd like populated with Stampede data and you're good to go!