Configure API key
step-1:
First, log in to your MailChimp account.
step-2:
Click on the profile icon on the right side and then select “Account & billing” from the dropdown menu.

step-3:
Look for the section titled “Extras” and click on it.
In the Extras section, you will find an option for “API keys”. Click on it.

Step:4
On the API keys page, you will see a list of any existing API keys you have created. To create a new API key, click on the “Create New Key” button.

step-5:
Mailchimp will generate a new API key for you. The key will be displayed on the API keys page.
Now click Generate key

step-6
Make sure to copy and securely store the API key as it will be needed to connect your plugin to Mailchimp.

That’s it! You have successfully created an API key in Mailchimp.
Audience Id
Configure Audience Id
step-1:
First, log in to your MailChimp account.
step-2:
From the dashboard, navigate to the “Audience” tab or “Lists” tab. The exact name may vary depending on your Mailchimp version.
In the Audience section, click on the “Audience Dashboard” or “Create List” button, and then click the “Create Audience” button.

step-3:
Fill in the required information for your audience, such as Audience Name, Audience Contact Information, and Audience Default Settings.
Click on the “Save” or “Create Audience” button to create your audience.

step-4:
Once the audience is created, you will be redirected to the audience settings page.
In the top menu bar, click on “Settings” to open the drop-down menu, and then click on “Audience Name and Defaults”.

step-5:
In the audience settings, you should be able to find the Audience ID. It is typically displayed near the top of the settings page or in a dedicated section labeled “Audience ID”

Please note that the exact button labels and interface may vary depending on your Mailchimp version. If you have any difficulties or need further assistance, I recommend consulting Mailchimp’s official documentation or contacting their support team for guidance.