The MailerLite API integration is only available if you have a MailerLite account.
Step 1: To find your MailerLite API key head to your MailerLite Dashboard > Integrations > Developer API section > Generate new token:
Step 2: Name your token, something easy to remember. In this example, we're calling this token Grow. Once you've named the token, click Create token.
Step 3: Copy your new API Key, head over to Grow Publisher Portal > Site Settings > Integrations and add Your API Key:
Step 4: Make sure to click Save Changes once you’ve added the MailerLite API key.