Integration Using Access Token
Access your Mailchimp dashboard.
Click on your user icon on the top right.
Click on 'Account' in the dropdown list.
Click on the Extras dropdown list and then select 'API Keys'.
Scroll down and create a new key by clicking on 'Create a Key' under the 'Your API keys' section.
Use the API key with your Mailchimp credentials in MMIO Integrations.